LS-DYNA_培训教程【姜正旭MSC.Software上海办事处】

7/22/2019 LS-DYNA_ MSC.Software

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LSLS--DYNADYNA

MSC.SoftwareMSC.Software


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LS-Prepost
http://../ls-post.ppthttp://../ls-post.ppt


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()


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LS-DYNA ()

()

/ / Euler/ALE () CFD ()

EFG (Element Free Galerkin)

SPH (Smooth Particle Hydrodynamics)


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LIVERMORE SOFTWARE TECHNOLOGY CORPORATIONLIVERMORE SOFTWARE TECHNOLOGY CORPORATION

LS-DYNA?,

- (Lagrangian/Euler/ALE)- (,,,)

SMP (Shared Memory Parallel)

MPP (Massively Parallel Procesing)


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(,,,.)/ & (/,/,,) ()/


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LSTC Public domain DYNA3D, Dr. John O. Hallquist/Lawence

Livermore National Laboratory, 1976

LSTC and LS-DYNA3D founded by Dr. Hallquist in 1988

In the 1990s

LS-DYNA2D LS-DYNA3D (LS-DYNA)

(LS-NIKE3D) LS-DYNA

(TOPAZ) LS-DYNA

MPP

Eulerian/ALEEuler/Lagrange

LS-POST, LS-OPT


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LSTC 2000,

MPP

LS-POST (LS-PREPOST) : US, UK, Nordic countries, France, Germany,

Italy, Netherlands, Japan, Korea, China,Taiwan, India, Brazil;also through ANSYS and MSC.

40+ +

Troy, Michigan branch of LSTC opened 2003

LS-DYNA 970

LS-DYNA: 971, 980


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LS-DYNA LSTC ftp site (ftp.lstc.com)

Please contact your LS-DYNA distributor for access to: Latest production software Manuals Example input decks

Hybrid III dummy models Web Sites (www.lstc.com, www.ls-dyna.com)

Short course offerings AVI library

Documentation downloads Newsletter (www.feainformation.com)

Help Pages (www.lstc.com/help)

LS-DYNA Conference Papers (www.dynalook.com,

www.feapublications.com) Technical Support (LS-DYNA distributor, [email protected])
ftp://ftp.lstc.com/http://www.lstc.com/http://www.ls-dyna.com/http://www.dynalook.com/http://www.dynalook.com/http://www.ls-dyna.com/http://www.lstc.com/ftp://ftp.lstc.com/


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LSLS--DYNADYNA

//

Euler/ALEEuler/ALE

(SPH, EFG)(SPH, EFG)

// ll


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ApplicationApplication Drop testDrop test Roll of CoinsRoll of Coins


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ApplicationApplication

A li iA li ti A iA t ti


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ApplicationApplication --AutomotiveAutomotive Frontal Crash with TruckFrontal Crash with Truck


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ApplicationApplication --AutomotiveAutomotive


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ApplicationApplication --AutomotiveAutomotive http://http://www.topcrunch.orgwww.topcrunch.org


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ApplicationApplication --AutomotiveAutomotive

Interaction of Head with AirbagInteraction of Head with Airbag


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EulerianEulerian

16 CPUs MPP < 1 day 1 processor > 2 weeks16 CPUs MPP < 1 day 1 processor > 2 weeks

Notice hole

in fabric


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E lE l


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EulerEuler


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Fluid-structure interaction :Couples the motion of a Lagrangian node to the motion of the

material point inside the Eulerian/ALE mesh using a penalty-

based algorithm

Fluid-structure interaction :Couples the motion of a Lagrangian node to the motion of the

material point inside the Eulerian/ALE mesh using a penalty-

based algorithm

Eulerian Fluid

- Courtesy of The Yokohama T ire Co Ltd

- Courtesy of The Yokohama Tire Co Ltdourtesy of The Yokohama Tire Co Ltd

Lagrangian Structure

void

water


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No Tire Translation)No Tire Translation)

Courtesy of The Yokohama T ire Co Ltd

Courtesy of The Yokohama Tire Co Ltdourtesy of The Yokohama Tire Co Ltd


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Tire translates)Tire translates)

Moving ALE) Reference SystemCourtesy of The Yokohama T ire Co Ltd

Moving ALE) Reference SystemCourtesy of The Yokohama Tire Co Ltdourtesy of The Yokohama Tire Co Ltd

A li tiA li ti AA


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ApplicationApplication --AerospaceAerospace

Simulation provided courtesy of


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p yPurdue University,CivilEngineering Dept., Sozen and Kilic


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Coupled Euler/Lagrange SimulationCoupled Euler/Lagrange Simulation

HH Section Extrusion (Section Extrusion (EulerianEulerian))


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HH--Section Extrusion (Section Extrusion (EulerianEulerian))

Tools not shown


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ApplicationApplication -- Metal FormingMetal Forming

Tube BendingTube Bending TubeTube HydroformingHydroforming


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Metal Forming with HMetal Forming with H--adaptivityadaptivity Forming of Door PanelForming of Door Panel


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severe dynamic effects during early stages

of completely explicit forming simulation

Channel SimulationChannel Simulation


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Channel SimulationChannel Simulation

with Implicit/Explicit Switchingwith Implicit/Explicit Switching

ApplicationApplication ImplicitImplicit


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pppp ppSteering SystemSteering System

Static Nonlinear Analysis:Static Nonlinear Analysis: *CONSTRAINED_JOINT_UNIVERSAL, RACK_AND_PINION, TRANSLATIONAL*CONSTRAINED_JOINT_UNIVERSAL, RACK_AND_PINION, TRANSLATIONAL

*MAT_GENERAL_JOINT_DISCRETE_BEAM*MAT_GENERAL_JOINT_DISCRETE_BEAM

model details

12,000 nodes

21,000 equations

memory=8m (64 Mbyte)

performance

14 nonlinear steps

1 cpu: 18 min

I li it t b hImplicit t be c sh


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Implicit tube crushImplicit tube crush


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Implicit tube crushImplicit tube crush

Nonlinear Stress-Strain CurvePlastic Strain at 2 seconds


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Speed = 5530 m/sSpeed = 5530 m/s

ExperimentExperiment SimulationSimulation

SPH (Smooth Particle Hydrodynamics)

SPH (SPH (SSmoothmooth PParticlearticle HHydrodynamics)ydrodynamics)


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G ( l G l ki ) li i


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EFG (ElementEFG (Element--FreeFree GalerkinGalerkin) Applications) Applications

..

EFG (EFG ( FEMFEM 44

55

))

B I tB I t EFG A hEFG A h


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Bar ImpactBar Impact EFG ApproachEFG Approach


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Foam CrushFoam Crush

No EFG

(elements distort) Last Layer = EFG(no distortion)



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LS-DYNA



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,*boundary_prescribed_motion_rigid.

(

*keyword

*define_table)

*

$

0



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*KEYWORD *CONTROL_TERMINATION

*NODE

*ELEMENT

*MAT

*SECTION

*PART

*DATABASE_BINARY_D3PLOT

*END

:



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*NODE

Nodal ID

x, y, z

*boundary_spc



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*PART

PartPart .

part ID(PID)

*PART : (*part_contact)

(*part_inertia)



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*ELEMENT_option

Option , *element_shell ID Part ID (PID): ID, ID Node IDs () Optional data can be provided to override shell

thickness, orthotropic material angle, etc. on an

element-by-element basis.



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*MAT_option

Option , *mat_elastic, *mat_rigid,*mat_linear_piecewise_plasticity

() 100 8/ 1 6 ()



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*SECTION_option

Option BEAM, DISCRETE, SHELL, SOLID ...



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*ELEMENT_...

eid, pid, n1, n2, etc

*PART *NODE

pid, sid, mid, eosid, hgid, nid, x, y, z

*HOURGLASS

hgid, *SECTION_... *EOS_GRUNEISEN

sid, elform, eosid,

*MAT_

mid, rho,


*DATABASE BINARY ti


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*DATABASE_BINARY_option

LS-Prepost Options

D3PLOT: D3PART: part

D3THDT: (D3PLOT

) D3DRLF:

INTFOR:



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:

, g=filename

()

50 100

d3thdt


*DATABASE EXTENT BINARY


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*DATABASE_EXTENT_BINARY

*DATABASE_EXTENT_BINARY

(MAXINT)

3 (mid, bottom, top) (STRFLG)

LS-DYNA

(CMPFLG) / ( *mat_orthotropic_elastic)


*DATABASE EXTENT BINARY ( td)


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*DATABASE_EXTENT_BINARY (contd)

d3plot (IEVERP)

(BEAMIP) ()

(SHGE) ,


*DATABASE option


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*DATABASE_option

ASCII

( LS-Prepost)

ASCII ( )

(binout)


ASCII


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ASCII

Airbag Statistics *DATABASE_ABSTAT

volume pressure internal energy mass flow

density temperature output mass flow rate Mass

Boundary Nodal Forces *DATABASE_BNDOUT


ASCII


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ASCII

Discrete Element Data *DATABASE_DEFORC

: & x,y,z

Element Data *DATABASE_ELOUT

*DATABASE_HISTORY_option


ASCII


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ASCII

ELOUT data (continued)

beams

axial resultant force

resultant s-shear and t-

shear resultant s-moment and t-

moment

toroidal resultant

solids (bricks)

global stresses

Eff. Plastic strain

shells

Upper and lower localstrains (requires strainoutput flag to be set in*database_extent_binary)

Local stresses and eff.Plastic strain

Available at each thru-thickness integrationpoint


ASCII


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ASCII

Global Statistics *DATABASE_GLSTAT global energy information

total energy total energy / init ial energy kinetic energy internal energy (includes sti ffness damping energy) hourglass energy Rigidwall (stonewall) energy spring and damper energy (incl. in internal energy) system (mass) damping energy contact interface energy

external work global x, y, and z velocity time step *CONTROL_ENERGY required to get hourglass, rigidwall, damping

energies


ASCII


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ASCII

Geometric Contact Entities *DATABASE_GCEOUT

forces and moments

Joint Forces *DATABASE_JNTFORC forces and moments (including moments due to joint friction)

Material Energies *DATABASE_MATSUM material information for each part

kinetic energy

internal energy hourglass energy

global momentum

global velocity


ASCII


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ASCII

Nodal Contact Interface Forces *DATABASE_NCFORC global forces set print flag in contact defini tion

Nodal Forces *DATABASE_NODFOR global forces

requires *DATABASE_NODAL_FORCE_GROUP

Nodal Point Data *DATABASE_NODOUT displacement & rotation

velocity & angular velocity acceleration & angular acceleration Output can be in a fixed coordinate system or in an updated local

coordinate system

requires *DATABASE_HISTORY_option to identify nodes


ASCII


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ASCII

Rigid Body Data *DATABASE_RBDOUT displacement & rotation

velocity & angular velocity acceleration & angular acceleration

Resultant Interface Forces *DATABASE_RCFORC

global forces of defined contacts

Rigid Wall Forces *DATABASE_RWFORC normal force

global forces

Seat Belt Output *DATABASE_SBTOUT

Force and length of each 2D element_seatbelt Information on slip rings and retractors


ASCII


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ASCII

Sliding (Contact) Interface Energy *DATABASE_SLEOUT slave and master contact energies for each contact defined

SPC Reaction Forces *DATABASE_SPCFORC global forces and moments

Spotweld/Rivet Forces *DATABASE_SWFORC axial force shear force applies to all rigid nodal constraints

Cross Section Forces/Torques *DATABASE_SECFORC See following slide



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part.

*DATABASE_SECFORC

,,.

:

*DATABASE_CROSS_SECTION_PLANE

*DATABASE_CROSS_SECTION_SET



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*BOUNDARY

*INITIAL

*LOAD

*CONTACT *CONSTRAINED

*RIGIDWALL

The following commands are used to drive the model.


*BOUNDARY option


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BOUNDARY_option

SPC () PRESCRIBED_MOTION (,,) NON_REFLECTING ()

, Thermal ()

(USA)

Options


*INITIAL option


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INITIAL_option

INITIAL_VELOCITY ()

INITIAL_STRESS (_shell, _solid, _beam)

INITIAL_VOLUME_FRACTION (multi-materialALE)

INITIAL_TEMPERATURE ()

DETONATION ()

Options


*LOAD option


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_ p

NODE or RIGID_BODY ( )

SEGMENT or SHELL () BODY ( ) THERMAL ( ())

Options


*CONSTRAINED option


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_ p

(DOF)

NODAL_RIGID_BODY or EXTRA_NODES ( ) SPOTWELD or RIVET () TIEBREAK or TIED_NODES_FAILURE () RIGID_BODIES () JOINT_option2 () INTERPOLATION or SHELL_TO_SOLID ()

Options


*RIGIDWALL_option


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_ p

,. *DATABASE_RWFORC


*CONTROL_option


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p

( cpu)


*INCLUDE


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,

Nodes/Elements Constraints Contacts

Vehicle System

Contacts

Guardrail

Controller


*DEFINE_option


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,,, ., DEFINE_CURVE

vs. vs.

vs.*boundary_prescribed_motion

vs..


*DEFINE_CURVE


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(CLID)

,

(x) - (y)


*DEFINE_CURVE


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, vs.

,.

vs.

,, (load).


*SET_option


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,, parts.

,, Part


*DEFORMABLE_TO_RIGID


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.

. .

. (

.)


*INTEGRATION_option


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*INTERFACE_option


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SPRINGBACK_LSDYNA ()

,,

COMPONENT and LINKING


*PARAMETER


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(dyna deck).

*KEYWORD

&


*PARAMETER


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*KEYWORD

$

*PARAMETER

$ prmr1 val1 prmr2 val2 prmr3 val3

R SCLFCT 2.0 r lwrsfct 5.0 i ival 2

$

$

$$$$$ Note:

$$ The "&" must start in columns 1, 2 or 3 of the input field.

$

*BOUNDARY_PRESCRIBED_MOTION_NODE

$ nid dof vad lcid sf vid

5 3 0 1 &SCLFCT 0

6 &ival 0 1 &lwrsfct 07 3 0 1 &SCLFCT 0

$



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(sphere1.k)


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*KEYWORD$ uni t s: kg, mm, msec, GPA*MAT_PI ECEWI SE_LI NEAR_PLASTI CI TY$ el ast i c$ mi d r o e pr si gy et an f ai l eps

2 7. 83000- 6 200. 00000 0. 3000000 2000. 0000 1. 0000000 0. 3000000 0. 0000000

$ e/ p wi t h f ai l ur e$ 2 7. 83000- 6 200. 00000 0. 3000000 0. 0000000 0. 0000000 0. 3000000 0. 0000000$ 0. 0000000 0. 0000000 0 0

$ pl ast i c st r ai ns$ 0. 0000000 0. 0800000 0. 1600000 0. 4000000 99. 000000 0. 0000000 0. 0000000 0. 0000000$ von mi ses st r esses$ 0. 2070000 0. 2500000 0. 2750000 0. 2900000 0. 3000000 0. 0000000 0. 0000000 0. 0000000*i ni t i al _vel oci t y_gener at i on1, 2, , , , - 89

*cont act _sur f ace_t o_sur f ace1, 2, 3, 3

*TI TLEspher e1. k


sphere1.k


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*CONTROL_TERMI NATI ON1. 0000000 0 0. 0000000 0 0. 0000000

*CONTROL_TI MESTEP0. 0000000 0. 0000000 0 0. 0000000 0. 0000000 0 0 0

*CONTROL_SHELL

0. 0000000 0 0 0 0 0 0*CONTROL_DAMPI NG

0 0. 0000000 0. 0000000 0. 0000000 0. 0000000 0 0. 0000000 0*CONTROL_CONTACT0. 0000000 0. 0000000 0 0 0 0 0

0 0 0 0 0. 0000000 0 0 0*CONTROL_OUTPUT

0 0 0 0 0. 0000000 0 0*CONTROL_ENERGY

1 2 1 1*DATABASE_BI NARY_D3PLOT0. 1000000 0

*DATABASE_BI NARY_D3THDT

10. 000000*DATABASE_EXTENT_BI NARY0 0 0 0 0 0 0 00 0 0 0 0 0

*CONTROL_CPU0. 0000000

*MAT_RI GI D

1 7. 83000- 6 200. 00000 0. 3000000 0. 0000000 0. 0000000 0. 00000000. 0000000 0. 0000000 0. 00000000. 0000000 0. 0000000 0. 0000000 0. 0000000 0. 0000000 0. 0000000 0. 0000000 0. 0000000


sphere1.k


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*SECTI ON_SOLI D1 0

*SECTI ON_SHELL2 0 0. 0000000 0. 0000000 0. 0000000 0. 0000000 0

2. 5000000 2. 5000000 2. 5000000 2. 5000000 0. 0000000

*PART

1 1 1 0 0 0 0 0*PART

2 2 2 0 0 0 0 0*NODE

1- 2. 193931007E+01- 2. 193931007E+01- 9. 339309692E+00 0 02- 2. 145448303E+01- 2. 145448303E+01- 8. 854482651E+00 0 0

.

.3633 7. 093333435E+01 7. 600000000E+01- 2. 542500114E+01 0 03634 7. 600000000E+01 7. 600000000E+01- 2. 542500114E+01 0 0

*ELEMENT_SOLI D1 1 1 2 7 6 46 47 52 512 1 2 3 8 7 47 48 53 523 1 3 4 9 8 48 49 54 53

.

.2046 1 2630 2631 2295 2286 1773 1854 1863 1782

2047 1 2631 2632 2304 2295 1854 1935 1944 18632048 1 2632 2633 2313 2304 1935 2016 2025 1944


sphere1.k


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*ELEMENT_SHELL1 2 2674 2705 2706 26752 2 2675 2706 2707 26763 2 2676 2707 2708 2677

.

.

.899 2 3601 3632 3633 3602900 2 3602 3633 3634 3603

*BOUNDARY_SPC_NODE2674 0 1 1 1 1 1 12705 0 1 1 1 1 1 1

2736 0 1 1 1 1 1 1...

3603 0 1 1 1 1 1 13634 0 1 1 1 1 1 1

*END


Sphere impacting plate


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Sphere impacting plate


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Exercise 1a



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//

((,, ,, ,, ,, ,, ,, )),, //


LSLS--PrepostPrepost


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LSLS--PrepostPrepost LSTCLSTC (( license)license)

PCPC

GUIGUI,, ..

((LSLS--DYNADYNA ))

(( treetree ))

2, 3, 4,2, 3, 4, D (D (DD is for Display)is for Display)



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: LS: LS--PrepostPrepost UserUsers Manual (from ftp site)s Manual (from ftp site)


lsprepostlsprepost d3plotd3plot lsprepostlsprepost sphere1.ksphere1.k

((),),

ShiftShift (()) CtrlCtrl (())

:: -- ++

Rotate Translate Zoom



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AcenAcen:: ZinZin:: Top, Bottom, Front, Back, Right, Left:Top, Bottom, Front, Back, Right, Left:.. Shad, Hide, Wire, ViewShad, Hide, Wire, View::

Mesh:Mesh: RpartRpart:: partpart ClpClp, Reset,, Reset, RedwRedw ::



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FcompFcomp

RangeRange // ,, Toggle > Fringe Light OffToggle > Fringe Light Offandand Toggle > TextureToggle > Texture

AppearAppear(ance(ance)) partpart ..

.. SelparSelpar,, BlankBlank

IDID IdentIdent



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HistoryHistory ASCIIASCII ,, vs.vs. XyPlotXyPlot

,, ,, VectorVector ,, partpart FindFind .. ..

SettingSetting .. ,, ,, MeasureMeasure ..



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22 SPlaneSPlane..

partpart GroupsGroups ..

ViewsViews ..

FollowFollow ..

TraceTrace..

ASCIIASCII OutputOutput ..

partpart ColorColor..



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File/MovieFile/Movie..

GIF, TIFF,GIF, TIFF, ppmppm, JPEG, JPEG File/PrintFile/Print..

MiscMisc/Reflect/Reflect..

MiscMisc/Model Info/Model Info..

(()) Toggle > Beam StyleToggle > Beam StylePrismPrism



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Exercise 1bExercise 1b



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.. ..

..

..

..

..


LSLS--DYNADYNA


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ElasticElastic

ElasticElastic--PlasticPlastic

Orthotropic/AnisotropicOrthotropic/Anisotropic

Hyperelastic (Rubber)Hyperelastic (Rubber)

FoamsFoams

CompositesComposites

ViscoelasticViscoelastic

Heart/LungHeart/Lung

Acoustic materialAcoustic material

FabricFabric

Concrete/SoilConcrete/Soil

High ExplosivesHigh Explosives

Laminated GlassLaminated Glass

RigidRigid

UserUser--defineddefined

LS-DYNA .



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**MAT_ELASTIC(_FLUID)MAT_ELASTIC(_FLUID)

(( 3030--40%40% ))

HyperelasticHyperelastic

Orthotropic ElasticOrthotropic Elastic

,, ,,



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..

**control_timestepcontrol_timestep ERODEERODE **control_terminationcontrol_termination

DTMINDTMIN

,,.,.,

*MAT_ADD_EROSION*MAT_ADD_EROSION

,, ,, ll



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0.0.

LSLS--DYNADYNA

A good overview of contact is presented in a four part series inA good overview of contact is presented in a four part series in archived FEAarchived FEA


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11CopyrightCopyright 2003 by2003 by LIVERMORE SOFTWARE TECHNOLOGY CORPORATIONLIVERMORE SOFTWARE TECHNOLOGY CORPORATION

A good overview of contact is presented in a four part series inA good overview of contact is presented in a four part series in archived FEAarchived FEA

Information newsletters available atInformation newsletters available at

www.Feapublications.comwww.Feapublications.com

The series is contained in the August, September, October, and DThe series is contained in the August, September, October, and Decemberecember

2001 newsletters.2001 newsletters.

Helpful info on contact and other LSHelpful info on contact and other LS--DYNA topics is available onDYNA topics is available on--line atline at

www.lstc.comwww.lstc.com/help/help

LagrangianLagrangian


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PartsParts //////

PartsParts

*CONTACT*CONTACT11

partpart ID(sID(s) (include or exclude)) (include or exclude) (Segment)(Segment)

boxes (include or exclude)boxes (include or exclude)


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ContactContact

typetype

(*CONTACT_)(*CONTACT_)

*CONTROL_CONTACT*CONTROL_CONTACT

*CONTACT*CONTACT

((

23.6 )23.6 )


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(Bucket)(Bucket) (( 23.8.123.8.1 23.11)23.11)

SOFT=0SOFT=0 11

(())

SOFT=2SOFT=2


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(contact_constraint)(contact_constraint) (contact_sliding_only)(contact_sliding_only)

--

automaticautomatic


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automaticautomatic

nonnon--automaticautomatic

**control_contactcontrol_contact *contact*contact SHLTHKSHLTHK

Shell

midplane

Physical

gap

Contactthickness

**section_shellsection_shell **element_shell_thicknesselement_shell_thickness


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LSLS--PREPOSTPREPOST (Appear > Thick)(Appear > Thick)

==

*contact*contact **part_contactpart_contact

(see Table 6.1 in(see Table 6.1 inUserUsers Manual)s Manual)

AA SOFTSOFT


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(())

(good!)(good!)

:: 23.323.3 23.723.7

: SOFT=0: SOFT=0

::

KA2


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V

KAk

2

=

K is the material bulk modulusK is the material bulk modulus

is the penalty scale factoris the penalty scale factor

A is the segment areaA is the segment areaV is the element volumeV is the element volume

::

diagonalshellMaxk

KA=

: SOFT=1: SOFT=1 SOFTSOFT *CONTACT*CONTACT AA SOFT=1SOFT=1


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SOFT=1SOFT 1 SOFT=0SOFT=0((),),

,, DtDt

SOFT=1SOFT=1

2t

m

SOFSCLk =

(())

//


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Master

Slave

+

= +

NonNon--automatic vs. Automaticautomatic vs. Automatic

**CONTACT SURFACE TO SURFACECONTACT SURFACE TO SURFACE


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CONTACT_SURFACE_TO_SURFACECONTACT_SURFACE_TO_SURFACE

nonnon--automaticautomatic

(SHLTHK)(SHLTHK)

**control_contactcontrol_contact ORIENORIEN

*CONTACT_*CONTACT_AUTOMATICAUTOMATIC_SURFACE_TO_SURFACE_SURFACE_TO_SURFACE

(looks in both directions)(looks in both directions)

f

(())


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slavemaster

t

f

slavemaster

t

,,


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(()) (())

NonNon--automaticautomatic AUTOMATICAUTOMATIC

**CONTACT_...CONTACT_...

NODES_TO_SURFACENODES_TO_SURFACE

ONE WAY SURFACE TO SURFACEONE WAY SURFACE TO SURFACE


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ONE_WAY_SURFACE_TO_SURFACEONE_WAY_SURFACE_TO_SURFACE

AUTOMATICAUTOMATIC_NODES_TO_SURFACE_NODES_TO_SURFACE

ONE_WAY_ONE_WAY_AUTOMATICAUTOMATIC_SURFACE_TO_SURFACE_SURFACE_TO_SURFACE

FORMING_NODES_TO_SURFACEFORMING_NODES_TO_SURFACE

ERODING_NODES_TO_SURFACEERODING_NODES_TO_SURFACE

CONSTRAINT_NODES_TO_SURFACECONSTRAINT_NODES_TO_SURFACE

One_Way_Surface_to_SurfaceOne_Way_Surface_to_Surface

nodes_to_surface contactnodes_to_surface contact


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INTFORINTFOR

(more on that later)(more on that later)

Single Surface ContactsSingle Surface Contacts

selfself--contact (contact ()) partpart--toto--partpart


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(())

twotwo--way treatmentway treatment

RCFORCRCFORC .. *contact_force_transducer_penalty*contact_force_transducer_penalty

Single Surface ContactsSingle Surface Contacts ::

SINGLE_SURFACE (SINGLE_SURFACE ( )) AUTOMATIC_SINGLE_SURFACE (AUTOMATIC_SINGLE_SURFACE ())

AIRBAG SINGLE SURFACEAIRBAG SINGLE SURFACE


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AIRBAG_SINGLE_SURFACEAIRBAG_SINGLE_SURFACE

ERODING_SINGLE_SURFACEERODING_SINGLE_SURFACE

AUTOMATIC_GENERALAUTOMATIC_GENERAL AUTOMATIC_GENERAL_INTERIORAUTOMATIC_GENERAL_INTERIOR

AUTOMATIC_SINGLE_SURFACEAUTOMATIC_SINGLE_SURFACE

AUTOMATIC_GENERALAUTOMATIC_GENERAL

AUTOMATIC_SINGLE_SURFACEAUTOMATIC_SINGLE_SURFACE

AIRBAG_SINGLE_SURFACEAIRBAG_SINGLE_SURFACE (VERY(VERYexpensive)expensive)

Eroding ContactEroding Contact

erodingerodingcontact.contact.


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eroding contacteroding contact

ECDTECDT (*CONTROL_CONTACT)(*CONTROL_CONTACT)erodingeroding

contactcontact

(())

**CONTROL_CONTACTCONTROL_CONTACT ENMASSENMASS

LSLS--PREPOSTPREPOSTDeleted Nodes onDeleted Nodes on

Eroding ContactEroding Contact

**CONTACT_ERODING_SINGLE_SURFACE (CONTACT_ERODING_SINGLE_SURFACE ()) CONTACT_AUTOMATIC_SINGLE_SURFACECONTACT_AUTOMATIC_SINGLE_SURFACE


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*CONTACT_ERODING_NODES_TO_SURFACE*CONTACT_ERODING_NODES_TO_SURFACE

*CONTACT_ERODING_SURFACE_TO_SURFACE*CONTACT_ERODING_SURFACE_TO_SURFACE

Projectile Penetrating PlateProjectile Penetrating Plate


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132/487


(SOFT=2)(SOFT=2)

.. SOFT=1SOFT=1 (().).

(ne t slide)(next slide)


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(next slide).(next slide).

.. ::

AA soft=2soft=2

970970 MPPMPP

(SOFT=2)(SOFT=2)

LS-DYNA:


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Standard* Contact

Segment-Based Contact

________________________________________________

**standard contact refers col lectively to these 9 contact types: 3, a3, 10, a10, 4,13, a13, 14, and 15 with soft=0 or soft=1.

(SOFT=2)(SOFT=2)


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.

(SOFT=2)(SOFT=2)

SegmentSegment--Based Contact is implemented for:Based Contact is implemented for: Surface_to_surface (3)Surface_to_surface (3)

Automatic surface to surface (a3)Automatic surface to surface (a3)


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Automatic_surface_to_surface (a3)Automatic_surface_to_surface (a3)

Single_surface (4)Single_surface (4) One_way_surface_to_surface (10)One_way_surface_to_surface (10)

Automatic_one_way_to_surface (a10)Automatic_one_way_to_surface (a10)

Automatic_single_surface (13)Automatic_single_surface (13) Airbag_single_surface (a13)Airbag_single_surface (a13)

Eroding_surface_to_surface (14)Eroding_surface_to_surface (14)

Eroding_single_surface (15)Eroding_single_surface (15)

(SOFT=2)(SOFT=2)

.


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.

.

shooting node logicSNLOG

IGNORE1 SOFT=0 or 1 .

(SOFT=2)(SOFT=2)

SOFT=2SBOPT A


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2 ():

3: 4: 5: 3 4

DEPTH A 2 ():

3:

2

5: 2

SegmentSegment--Based Contact (SOFT=2)Based Contact (SOFT=2)Falling Balls using SegmentFalling Balls using Segment--Based ContactBased Contact


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SegmentSegment--Based Contact (SOFT=2)Based Contact (SOFT=2)Falling Balls using SegmentFalling Balls using Segment--Based ContactBased Contact


140/487


Falling Blocks using SegmentFalling Blocks using Segment--BasedBasedContactContact

..


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up

CONTACT_INTERIORCONTACT_INTERIOR

..


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Part set IDPart set ID

(fraction of initial thickness)(fraction of initial thickness)

970970 (TYPE=2).(TYPE=2).

**CONTACT_DRAWBEADCONTACT_DRAWBEAD

Approximates complex behavior of aApproximates complex behavior of a drawbeaddrawbead

*CONTACT_FORMING_...*CONTACT_FORMING_...


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Nodes_to _surface, surface _to _surface, oneNodes_to _surface, surface _to _surface, one--way_surface_to _surface optionsway_surface_to _surface options

(()) (as in IGES surfaces)(as in IGES surfaces)

(())

look aheadlook aheadhh--adaptivityadaptivity

2D Contact2D Contact

**CONTACT_2D_CONTACT_2D_


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1212--1515

7,87,8

CONTACT_2D_CONTACT_2D_AUTOMATICAUTOMATIC_..._...

CONTACT_2DCONTACT_2D

**CONTACT_FORCE_TRANSDUCER_optionCONTACT_FORCE_TRANSDUCER_option


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22 33

**database_rcforcdatabase_rcforc

*CONTACT_FORCE_TRANSDUCER*CONTACT_FORCE_TRANSDUCER _PENALTY (_PENALTY ())

_CONSTRAINT (_CONSTRAINT ())

*contact*contactVDCVDC VDC =VDC = (2m(2m ))


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VDC (2m( )) 20%20% = 20,= 20, 0.200.20

:: k = interface stiffnessk = interface stiffness

m = min {m = min {mmslaveslave,m,mmastermaster}} partpart partpart

**DATABASE_optionDATABASE_option

ASCIIASCII

G S


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GLSTAT:GLSTAT:

RCFORC:RCFORC: SLEOUT:SLEOUT:

NCFORC:NCFORC: (( **contactcontact SPR=1SPR=1 MPR=1)MPR=1)

BinaryBinary

*DATABASE_BINARY_INTFOR*DATABASE_BINARY_INTFOR (())

*contact_*contact_11 SPR=1SPR=1 MPR=1MPR=1

s=filenames=filename LSLS--PREPOSTPREPOST


(Default=0.10) [SLSFAC](Default=0.10) [SLSFAC]

Effect is cumulative with penalty scale factor specified on cardEffect is cumulative with penalty scale factor specified on card 3 of3 of


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Effect is cumulative with penalty scale factor specified on cardEffect is cumulative with penalty scale factor specified on card 3 of3 of

*contact*contact

[RWPNAL][RWPNAL]

(non(non--automatic)automatic) [SHLTHK][SHLTHK]

[THKCHG][THKCHG]

**control_shellcontrol_shell

SOFT=0SOFT=0 [PENOPT][PENOPT]

// [ORIEN][ORIEN]


[ENMASS][ENMASS]


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[NSBCS][NSBCS]

[SSTHK][SSTHK]

[ECDT][ECDT]

IGNOREIGNORE [IGNORE][IGNORE]

(INTFOR)(INTFOR)..

FRCENG=1 (*CONTROL_CONTACT)FRCENG=1 (*CONTROL_CONTACT)


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..

..

..

(Brake squeal)(Brake squeal)


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(Brake squeal)(Brake squeal)

**CONTACT_SURFACE_TO_SURFACECONTACT_SURFACE_TO_SURFACE

..

Practical GuidelinesPractical Guidelines


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..

IGNORE=1 (via *control_contact or *contact),IGNORE=1 (via *control_contact or *contact),

..

d3hspd3hsp IGNORE=0IGNORE=0

IGNORE=2IGNORE=2 IGNORE=1IGNORE=1 ,, (v. 970)(v. 970)

Practical GuidelinesPractical Guidelines


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IGNORE=0IGNORE=0 LSLS--PREPOSTPREPOST 00 11

00 11

11.. 11

..

Practical GuidelinesPractical GuidelinesGeneral TipsGeneral Tips

**CONTACT_AUTOMATIC_SINGLE_SURFACE with SOFT=1CONTACT_AUTOMATIC_SINGLE_SURFACE with SOFT=1

(( ))

**contact force transducercontact force transducer


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**contact_force_transducercontact_force_transducer

*CONTACT_AUTOMATIC_GENERAL*CONTACT_AUTOMATIC_GENERAL

*contact_automatic_general_interior*contact_automatic_general_interior

(check)(check)


(( 11

2 mm)2 mm) BB SLDTHKSLDTHKSLDSTFSLDSTF ((**mat_nullmat_null ))

(one(one--way contact)way contact)


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(one(one-way contact)way contact)

*contact*contact 33

**contactcontact AA SOFT=1SOFT=1 ..

RoundRound--off corners using finer meshoff corners using finer mesh

(SOFT=2)(SOFT=2)


d3hspd3hsp IGNORE=1IGNORE=1


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OKOK.. 100100.. *contact*contact **control_contactcontrol_contact..

..

((

))

Tied Contact ApplicationsTied Contact Applications

Spotweld to shell


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Tied interface permits mesh transition

Tied interface

Shell edge to surface

Spotweld to shell

surface


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OFFSETOFFSET TIEBREAKTIEBREAK OK for rigid bodiesOK for rigid bodies

Tied ContactsTied Contacts with Failurewith Failure

TIEBREAK_NODES_TO_SURFACETIEBREAK_NODES_TO_SURFACE

nonnon--automatic nodes_to_surfaceautomatic nodes_to_surface

TIEBREAK SURFACE TO SURFACETIEBREAK SURFACE TO SURFACE


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TIEBREAK_SURFACE_TO_SURFACETIEBREAK_SURFACE_TO_SURFACE

,, nonnon--automatic surface_to_surfaceautomatic surface_to_surface

postpost--failure stressfailure stress--vsvs--gap curvegap curve

TIED_SURFACE_TO_SURFACE_FAILURETIED_SURFACE_TO_SURFACE_FAILURE

AUTOMATIC_AUTOMATIC__TIEBREAK_TIEBREAK ,,

,,

Practical GuidelinesPractical GuidelinesTied ContactTied Contact


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tied_shell_edge_to_surfacetied_shell_edge_to_surface

_constrained_offset_constrained_offsetoror _beam_offset_beam_offset

constrained_offsetconstrained_offset

beam_offset is an option only with tied_shell_edge_to_surface,beam_offset is an option only with tied_shell_edge_to_surface,notnot tied_nodes_to_surface or tied_surface_to_surfacetied_nodes_to_surface or tied_surface_to_surface

Tying PartsTying Parts

**CONSTRAINED_CONSTRAINED_


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spotweldspotweld generalized_weldgeneralized_weld

nodal_rigid_bodynodal_rigid_body

extra_nodesextra_nodes tietie--break (break ())

tied_nodes_failuretied_nodes_failure


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Exercise 1cExercise 1c


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1

(1)


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2

y

u

hardening

rupture

onset of

neckinge

Bridgman (1947,1952)


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3

xx

yy

zz


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4

-

e


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5

e

yd

d

E


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6

e

yd

dE ,

()

e


169/487

7

e

yd

dE ,

e


170/487

8

e

yd

dE


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9

,

02

313221 == yf

0yf

(),

, 0

2

21

2

1

2

2 =Yf


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10

0f

0f

Yield surface,0f

Stress State not valid,

Elastic domain1

2


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11

/


174/487

12

//

: /

oA

f

AreaOriginal

ForceStressgEngineerin =

oL

d

LengthOriginal

LengthinChangeStraingEngineerin =


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13

e

e

oA

f

ol

d

:

: / ee

coAA

fl

AreaCurrent

ForceStresssCauchyStressTrue 1'

eol

l

LengthCurrent

LengthinChangeStrainTrue

= 1lnln


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14

t

d

e

e

o

eA

f=

ol

d

ee 1

)1ln( e

:

xxvmeff

StressEffective =StrainEffective xxxx


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15

eff

eff


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16

eff

eff


179/487

17

&


180/487

18

eff

eff

&


181/487

19

LSDYNA Cowper-Symonds

Cowper-Symonds


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20

C p C C P 40/s 6


183/487

21

Pn

()


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22

&

1.0

()


185/487

23

.


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24

LS-DYNA VP=1

LSDYNA


187/487

25

*MAT_PLASTIC_KINEMATIC (mat_3)

Isotropic-Hardening

Kinematic-Hardening


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26

Mixed

Cowper-Symonds () ()

*MAT_JOHNSON_COOK (mat_15)

Los Alamos National Laboratory


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27

Los Alamos National Laboratory

*MAT_STRAIN_RATE_DEPENDENT_PLASTICITY(mat_19)

,

Youngs Modulus ( VP=1) Yield Stress Tangent Modulus


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28

Tangent Modulus

, : Von Mises stress

Effective plastic strain Maximum principal stress

shells/solids/thick shells

*MAT_PIECEWISE_LINEAR_PLASTICITY

(mat_24)

:

, , 8 vs. , vs.


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29

vs. ()

Cowper-Symonds

*MAT_PIECEWISE_LINEAR_PLASTICITY

( mat_81 )


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30

(shells only)

*MAT_SIMPLIFIED_JOHNSON_COOK (98, 99)

Mat_Johnson_Cook

*MAT_PLASTICITY_WITH_DAMAGE (81, 82)


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31

Mat_99 Mat_82

Exercise 1d


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32


EFG (Element FreeEFG (Element Free GalerkinGalerkin)) (*SECTION_SOLID_EFG)(*SECTION_SOLID_EFG)

((hysteresishysteresis or crushable)or crushable)


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(( yy ))

ELFORM 1ELFORM 1 22 33

66 (())

ELFORM 2.ELFORM 2.


**MAT_LOW_DENSITY_FOAM (57)MAT_LOW_DENSITY_FOAM (57)


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*INITIAL_FOAM_REFERENCE_GEOMETRY*INITIAL_FOAM_REFERENCE_GEOMETRY

:: ,,

*MAT_73*MAT_73 *MAT_57*MAT_57

*Mat_73*Mat_73


**MAT_FU_CHANG_FOAM (83)MAT_FU_CHANG_FOAM (83)

Drop tower dataDrop tower data ..


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..

..

:: ,,

duboisdubois--foam.pdffoam.pdf


**MAT_CRUSHABLE_FOAM (63)MAT_CRUSHABLE_FOAM (63)

,, ,, ..

vs.vs.


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,, (MAT_163)(MAT_163)


**MAT_MODIFIED_CRUSHABLE_FOAM (163)MAT_MODIFIED_CRUSHABLE_FOAM (163)

3&

mat_63


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1 - V

1 2 3 <


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(()) .. 66

RADIOSSRADIOSS 2828

RADIOSSRADIOSS (( (1(1 ) =) = /(1/(1++ ))

:: ,,


**MAT_MODIFIED_HONEYCOMB (126)MAT_MODIFIED_HONEYCOMB (126)

*mat_honeycomb*mat_honeycomb 00 9 (Co9 (Co--rotationalrotational

*MAT_MODIFIED_HONEYCOMB)*MAT_MODIFIED_HONEYCOMB)


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;;

ELFORM=0ELFORM=0

ELFORM=9ELFORM=9 ..


**MAT_TRANSVERSELY_ANISOTROPIC_MAT_TRANSVERSELY_ANISOTROPIC_CRUSHABLE_FOAM (142)CRUSHABLE_FOAM (142)

HirthHirth, Du Bois,, Du Bois, WeimarWeimar


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MAT_HONEYCOMBMAT_HONEYCOMB


55 *MAT_SOIL_AND_FOAM*MAT_SOIL_AND_FOAM

1414 *MAT_SOIL_AND_FOAM_FAILURE*MAT_SOIL_AND_FOAM_FAILURE

2626 *MAT_HONEYCOMB*MAT_HONEYCOMB

126126 *MAT_MODIFIED_HONEYCOMB*MAT_MODIFIED_HONEYCOMB5353 *MAT_CLOSED_CELL_FOAM*MAT_CLOSED_CELL_FOAM


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_ _ _

5757 *MAT_LOW_DENSITY_FOAM*MAT_LOW_DENSITY_FOAM

6262 *MAT_VISCOUS_FOAM*MAT_VISCOUS_FOAM

6363 *MAT_CRUSHABLE_FOAM*MAT_CRUSHABLE_FOAM

7373 *MAT_LOW_DENSITY_VISCOUS_FOAM*MAT_LOW_DENSITY_VISCOUS_FOAM

7575 *MAT_BILKHU/DUBOIS_FOAM*MAT_BILKHU/DUBOIS_FOAM

8383 *MAT_FU_CHANG_FOAM*MAT_FU_CHANG_FOAM


970970

142142 *MAT_TRANSVERSELY_ANISOTROPIC_CRUSHABLE_FOAM*MAT_TRANSVERSELY_ANISOTROPIC_CRUSHABLE_FOAM

144144 *MAT_PITZER_CRUSHABLE_FOAM*MAT_PITZER_CRUSHABLE_FOAM

154154 *MAT_DESHPANDE_FLECK_FOAM*MAT_DESHPANDE_FLECK_FOAM

163163 *MAT_MODIFIED_CRUSHABLE_FOAM*MAT_MODIFIED_CRUSHABLE_FOAM

177177 *MAT HILL FOAM*MAT HILL FOAM


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177177 MAT_HILL_FOAMMAT_HILL_FOAM

178178 *MAT_VISCOELASTIC_HILL_FOAM*MAT_VISCOELASTIC_HILL_FOAM

179179 *MAT_LOW_DENSITY_SYNTHETIC_FOAM*MAT_LOW_DENSITY_SYNTHETIC_FOAM

180180 *MAT_LOW_DENSITY_SYNTHETIC_FOAM_ORTHO*MAT_LOW_DENSITY_SYNTHETIC_FOAM_ORTHO


.. ::

**CONTACT_INTERIORCONTACT_INTERIOR *PART_SET*PART_SET (default = 1.0)(default = 1.0)


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**contact_interiorcontact_interior 970970

,, 5757 DAMP=0.5DAMP=0.5(( 1.01.0 ))


0.80.8 (*CONTROL_TIMESTEP)(*CONTROL_TIMESTEP) .


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..

ELFORM 10 (ELFORM 10 ())MAT_126,MAT_126, 0.0. EFGEFG .. (().).


,, (EOS)(EOS) .. (( 55

))


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).). ..

**control_bulk_viscositycontrol_bulk_viscosity *hourglass/*part*hourglass/*part ..



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LSLS--DYNADYNA


.. ,,

..

(( d it hd it h))


209/487

((sandwitchsandwitch)) ..


LSLS--DYNADYNA

..


210/487

(*mat)(*mat) *mat_2*mat_2 AOPTAOPT ((orthotropic_elasticorthotropic_elastic))

(*section_shell)(*section_shell) betabeta

(*element_shell_beta, *(*element_shell_beta, *element_solid_orthoelement_solid_ortho)) (( ))


GaussianGaussian LobattoLobatto


211/487

(())

*integration _shell*integration _shell **section_shellsection_shell QR/IRIDQR/IRID


**mat_2 (mat_2 (elastic_orthotropicelastic_orthotropic))

44 ,, fiber/matrix damagefiber/matrix damage *mat_22 (composite_damage)*mat_22 (composite_damage)

**control shellcontrol shell lamshtlamsht=1=1 laminatelaminate


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*control_shellcontrol_shell lamshtlamsht=1=1 laminatelaminateshellshell

*mat_54,55 (enhanced_composite_damage)*mat_54,55 (enhanced_composite_damage) **control_shellcontrol_shell lamshtlamsht=1=1 laminatelaminate

shellshell

*mat_58 (laminated_composite_fabric)*mat_58 (laminated_composite_fabric)

*mat_59 (composite_failure(_shell, _solid)_model)*mat_59 (composite_failure(_shell, _solid)_model)


Crashworthiness Analysis with EnhancedCrashworthiness Analysis with Enhanced

Composite Material Models in LSComposite Material Models in LS--DYNADYNA -- Merits andMerits andLimitsLimits,, SchweizerhofSchweizerhofet al, 5th International LSet al, 5th International LS--DYNADYNAUserUsers Conference (1998)s Conference (1998) LSLS--DYNDYN


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UserUsers Conference (1998)s Conference (1998) LSLS DYNDYN mat_54, mat_58, andmat_54, mat_58, and

mat_59.mat_59.


**mat_114 (layered_linear_plasticity)mat_114 (layered_linear_plasticity)

laminate shelllaminate shell

* t 116 (* t 116 ( it lit l ))


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*mat_116 (*mat_116 (composite_layupcomposite_layup))

laminate shelllaminate shell (( )) *integration_shell (*integration_shell ( )) Resultant formulation (Resultant formulation ())


**mat_117 (composite_matrix)mat_117 (composite_matrix)

*mat_118 (composite_direct)*mat_118 (composite_direct) Resultant formulation (Resultant formulation ( )) 2121


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2121 117117 118118 (( ))


**mat_161 (mat_161 (composite_msccomposite_msc))

Materials SciencesMaterials Sciences (( license)license)


216/487

(()) (())


,, **control_accuracycontrol_accuracyINN = 2INN = 2 InvarientInvarient Node NumberingNode Numbering


217/487

**database_extent_binarydatabase_extent_binary

CMPFLG (and STRFLG)CMPFLG (and STRFLG)11


(Geologic Materials)(Geologic Materials)


218/487

Dr. LenDr. Len SchwerSchwer(([email protected]@schwer.net ))LSLS--DYNADYNA..


(() vs.) vs.
mailto:[email protected]:[email protected]:[email protected]


219/487

vs.vs.

33--invarient cap modelinvarient cap model


**mat_5 (soil_and_foam)mat_5 (soil_and_foam) vs.vs.

*mat_16 (pseudo_TENSOR)*mat_16 (pseudo_TENSOR)TrescaTresca MohrMohr--CoulombCoulomb


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(EOS)(EOS) *mat_193 (*mat_193 (DruckerDrucker--PragerPrager))

Arup, UKArup, UK MohrMohr--CoulombCoulomb


**mat_145 (mat_145 (schwer_murray_capschwer_murray_cap))

33--invarient, continuous cap modelinvarient, continuous cap model

mat_25 (mat_25 (geologic_capgeologic_cap))


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970970

*mat_78 (soil_concrete)*mat_78 (soil_concrete)

*mat_79 (hysteretic_soil)*mat_79 (hysteretic_soil) *mat_192 (soil_brick)*mat_192 (soil_brick)


**mat_84,85 (mat_84,85 (winfrithwinfrith))

crack filecrack fi le LSLS--POSTPOST


222/487

*mat_96 (brittle_damage)*mat_96 (brittle_damage)

*mat_72 (concrete_damage)*mat_72 (concrete_damage)

*mat_111 (*mat_111 (johnson_holmquistjohnson_holmquist))


*mat_16, 72, 84,96*mat_16, 72, 84,96

*contact 1D (*contact 1D ( ))


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contact_1D (contact_1D ()) **constrained_lagrange_in_solidconstrained_lagrange_in_solid (())

..


,,

(PR ~ 0.5)(PR ~ 0.5)



224/487


**mat_27 (mat_27 (mooney_rivlinmooney_rivlin))

d3hspd3hsp


225/487

*mat_77 (*mat_77 (ogden_rubberogden_rubber,, hyperelastic_rubberhyperelastic_rubber))

((mat_27mat_27 ))

d3hspd3hsp

((viscoelasticityviscoelasticity))



226/487


**mat_7 (mat_7 (blatz_koblatz_ko))

*mat_87 (cellular_rubber)*mat_87 (cellular_rubber)


227/487

*mat_181 (*mat_181 (simplied_rubbersimplied_rubber))

OthersOthers


*mat_143 (wood)*mat_143 (wood)


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11

*mat_91 (*mat_91 ()) *mat_128 (*mat_128 ()) *mat_129 (*mat_129 ()) *mat_spring_muscle*mat_spring_muscle


*mat_90 (acoustic)*mat_90 (acoustic)


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22

*mat_34 (*mat_34 ())


*mat_19 (strain_rate_dependent_plasticity)*mat_19 (strain_rate_dependent_plasticity)

, *mat_1 (elastic), *mat_1 (elastic) *mat_add_erosion (*mat_add_erosion (


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33

))


// *MAT_24 (piecewise_linear_plasticity)*MAT_24 (piecewise_linear_plasticity) *MAT_81,82 (*MAT_81,82 (plasticity_with_damage(_orthotropicplasticity_with_damage(_orthotropic))))

*MAT_89 (plasticity_polymer)*MAT_89 (plasticity_polymer)

*MAT_101 (Geplastic_srate_2000a)*MAT_101 (Geplastic_srate_2000a)


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44

GEGE

*MAT_112 (finite_elastic_strain_plasticity)*MAT_112 (finite_elastic_strain_plasticity)

*MAT_141 (rate_dependent_polymer)*MAT_141 (rate_dependent_polymer)


*mat_60 (elastic_with_viscosity)*mat_60 (elastic_with_viscosity)

*mat_106 (*mat_106 (elastic_viscoplastic_thermalelastic_viscoplastic_thermal))


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55


Mat_66,67,68,69,70,71,74,93,94,95,97,119,121,146,196,Mat_66,67,68,69,70,71,74,93,94,95,97,119,121,146,196,197197

Mat_66 (mat_linear_elastic_discrete_beam)Mat_66 (mat_linear_elastic_discrete_beam)

66 (3(3 + 3+ 3 ))


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(( ))

66 (()) Mat_67 (mat_nonlinear_elastic_discrete_beam)Mat_67 (mat_nonlinear_elastic_discrete_beam)

33 -- + 3+ 3 33 -- + 3+ 3 (())

Mat_70 (mat_cable_discrete_beam)Mat_70 (mat_cable_discrete_beam)

,, (())


Mat_196 (mat_general_spring_discrete_beam)Mat_196 (mat_general_spring_discrete_beam)

66 (())

,, RADIOSSRADIOSS Property Set Type 8Property Set Type 8-- General SpringGeneral Spring


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p gp g

RADIOSSRADIOSS Property Set TypeProperty Set Type1313Beam Type SpringBeam Type Spring **section_beamsection_beam

SCOORSCOOR --22 2.2.


(HG)(HG)

,,

..


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..

..

,,


(( ( HG )( HG ) )) 12 HG12 HG 5 HG5 HG


236/487

1k

2k

3k

4k



237/487

( LS-Prepost )


::

66

77

ww--modemode


238/487



239/487


.. (())

..

..


240/487

0.10.10.030.03


33 IHQ=1: default (cheapest)IHQ=1: default (cheapest)

IHQ=2: FlanaganIHQ=2: Flanagan--BelytschkoBelytschko

IHQ=3:IHQ=3: FlanaganFlanagan--BelytschkoBelytschko 22


241/487

IHQ=4: FlanaganIHQ=4: Flanagan--BelytschkoBelytschko IHQ=5:IHQ=5: FlanaganFlanagan--BelytschkoBelytschko

IHG=6 (next slide)IHG=6 (next slide)


, co, co--rotationalrotational BelytschkoBelytschko--BindemanBindeman [1993][1993]

IHQ=6IHQ=6

..

..

.. ,, 0.10.1 ..

1.01.0 ,, ..

::


242/487

(>2)(>2) (foam, honeycomb, rubber)(foam, honeycomb, rubber)


IHQ = 1, 2,IHQ = 1, 2, 33

IHQ = 4, 5,IHQ = 4, 5, 66


243/487

IHQ=8IHQ=8 1616


**CONTROL_HOURGLASSCONTROL_HOURGLASS

*HOURGLASS*HOURGLASS

partpart (())

*PART*PART HGIDHGID

*CONTROL_ENERGY*CONTROL_ENERGY


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HGENHGEN 22 (()) *DATABASE_GLSTAT, *DATABASE_MATSUM*DATABASE_GLSTAT, *DATABASE_MATSUM

glstatglstat matsummatsum

*DATABASE_EXTENT_BINARY*DATABASE_EXTENT_BINARY

SHGESHGE 22


:: < 10%< 10% :: (( GLSTATGLSTAT )) part (part ( MATSUMMATSUM ))


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((

))


(( ),), 11

(()) 11 22 ..

,, ::


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((

partpart

)) (( ))


LSLS--DYNADYNA

((,, ))

((,, ))


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(()) EFGEFG SPHSPH (())


*ELEMENT_...eid, pid, n1, n2, etc

*PART *NODEpid, sid, mid, eosid, hgid, nid, x, y, z


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*HOURGLASS

hgid,

*SECTION_... *EOS_GRUNEISEN

sid, elform, eosid,

*MAT_

mid rho LIVERMORE SOFTWARE TECHNOLOGY CORPORATIONLIVERMORE SOFTWARE TECHNOLOGY CORPORATION

**ELEMENT_MASSELEMENT_MASS ID (EID)ID (EID) IDID

*ELEMENT_INERTIA*ELEMENT_INERTIA


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IDID IDIDID (ID ()) (alternative to *element_mass)(alternative to *element_mass)


**ELEMENT_DISCRETEELEMENT_DISCRETE

::

IDID part IDpart ID 22: N1, N2 (N2=0: N1, N2 (N2=0 ))


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N1 to N2 (N1 to N2 (),), ,, (*define_sd_orientation)(*define_sd_orientation),, 66

DEFORCDEFORC (0(0))


**ELEMENT_DISCRETEELEMENT_DISCRETE

*MAT_SPRING_*MAT_SPRING_ Force = F(displacement)Force = F(displacement)


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Maxwell (Maxwell ()) *MAT_DAMPER_*MAT_DAMPER_ Force = F(velocity)Force = F(velocity)


**SECTION_DISCRETE(SECTION_DISCRETE())

(()) (( ))(())//


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**ELEMENT_BEAMELEMENT_BEAM

,, ,, ,,

::

element IDelement ID

part IDpart ID


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3 node point ID3 node point IDs (s ())

**section_beamsection_beam

N1N1--toto--N2N2


Beam DefinitionBeam Definition

n3

r

n

s


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2

t

n1


**SECTION_BEAMSECTION_BEAM

66

HughesHughes--LiuLiu (ELFORM=1(ELFORM=1))

BelytschkoBelytschko--SchwerSchwer (ELFORM=2)(ELFORM=2)

(( ) (ELFORM 6)) (ELFORM 6)


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(() (ELFORM=6)) (ELFORM=6)

66//

(ELFORM=9)(ELFORM=9)

**mat_spotweldmat_spotweld;;



(cont(cont d)d)33

(() (ELFORM=3)) (ELFORM=3) (() (ELFORM=6)) (ELFORM=6)

**mat_cablemat_cable


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(1)(1) (9)(9) ::

(())

((,, , W, C, T, Z, W, C, T, Z,, )) (())

(2)(2) ::


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,, ,,

(6)(6) (3)(3) ::



(ELFORM=6)(ELFORM=6)::

: where VOL *: where VOL * = mass of beam= mass of beam

INER:INER: ((

))


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CID:CID: IDID

CIDCID *define_coordinate_nodes with*define_coordinate_nodes with

FLAG=1,FLAG=1, 33

(continued)(continued)



(continued):(continued): SCOOR: orientation update flagSCOOR: orientation update flag

SCOOR=2SCOOR=2

SCOORSCOOR00

SCOOR 3SCOOR 3


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SCOOR=3SCOOR=3

RRCON, SRCON, TRCON:RRCON, SRCON, TRCON:


**ELEMENT_SOLIDELEMENT_SOLID

33--DD

::

element IDelement ID part IDpart ID

8 node ID8 node IDss

n1,n2,n3,n4,n4,n4,n4,n4 for 4n1,n2,n3,n4,n4,n4,n4,n4 for 4--node tetrahedronnode tetrahedron


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n1,n2,n3,n4,n5,n5,n6,n6 for pentahedron (wedge)n1,n2,n3,n4,n5,n5,n6,n6 for pentahedron (wedge)

//*MAT_*MAT_


Solid ElementsSolid Elements

4

2

31

65

7

3

8


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6

3

4

2

1

5

2

64

1

8

5

*control_solid ESORT=1


Solid Element FormulationsSolid Element Formulations

1.1. (())

88--

(brick)(brick)

22 S/RS/R

ELFORMELFORM *SECTION_SOLID*SECTION_SOLID


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2.2. S/RS/R 2x2x22x2x2 (())

(())


Solid Element FormulationsSolid Element Formulations

3.3.

1414 2020

66

8 148 14


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8, 14.8, 14.

11 88 (())

*MAT_ACOUSTIC*MAT_ACOUSTIC (()) ,,


4.4.

44 55 (*control_solid)(*control_solid)

66

..

::


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66

10.10.

44 **control_solidcontrol_solid ESORT=1ESORT=1


13.13.

//3D R3D R--

44--::


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1010--

44

(*control_solid)(*control_solid)

101044

16 1016 10

1010--::


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16. 1016. 10 44 55

17.17. 1010

971971


Euler/ALEEuler/ALE

ALEALE EulerEuler (5,6,7,11,12)(5,6,7,11,12)


::

ELFORM 5: ALE (ELFORM 5: ALE ())

ELFORM 6: Eulerian (ELFORM 6: Eulerian ())


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ELFORM 6: Eulerian (ELFORM 6: Eulerian ()) ELFORM 7: Eulerian ambient (ELFORM 7: Eulerian ambient ())

::

ELFORM 11: Euler/ALEELFORM 11: Euler/ALE

(*mat_vacuum)(*mat_vacuum)

ELFORM 12: Euler/ALEELFORM 12: Euler/ALE


..

66..

,, 3333 ..

..


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**SECTION_SHELLSECTION_SHELL

partpart (IP)(IP)

(Gauss,(Gauss, LobattoLobatto, trapezoidal, user, trapezoidal, user--defined rule)defined rule)

(default = 1.0, 5/6(default = 1.0, 5/6 ;; ))

,, ,, (( HughesHughes--LiuLiu 1,1,6, 76, 7 ))


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6, 76, 7 ))

(( 22, 23, 33, 34, 36, 54, 55, 56, 59, 103)22, 23, 33, 34, 36, 54, 55, 56, 59, 103)


NIPNIP

11 (())

22 (())3+3+

CPUCPU


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Gauss (10Gauss (101010))

LobattoLobatto (())

Trapezoidal (Trapezoidal ())

UserUser--defined (*integration_shell)defined (*integration_shell)

ex.ex.


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*DATABASE_EXTENT_BINARY*DATABASE_EXTENT_BINARY MAXINTMAXINT


**ELEMENT_SHELLELEMENT_SHELL

IDID

part IDpart ID

44 (( ))

*SECTION_SHELL*SECTION_SHELL ((


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((*SECTION_SHELL*SECTION_SHELL ))


ELFORM=2: BelytschkoELFORM=2: Belytschko

--Tsay (BTsay (B

--T)T)

CoCo--rotationalrotational ((:: ))

((

*CONTROL_ACCURACY*CONTROL_ACCURACY )) *CONTROL SHELL*CONTROL SHELL


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*CONTROL_SHELL*CONTROL_SHELL

BWCBWC (( ))


*CONTROL_ACCURACY*CONTROL_ACCURACY

xx 11--22


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9090


1

4 3

2

3 2

1

4 3

2

3 2


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14

14


ELFORM=1: HughesELFORM=1: Hughes--LiuLiu LSLS--DYNADYNA

BB--TT ,,

JaumannJaumann ((: LS: LS--DYNADYNA ))


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BB--TT 22

OK for warped geometries if nodal fibers are incrementallyOK for warped geometries if nodal fibers are incrementally

and uniquely updated (IRNXX=and uniquely updated (IRNXX=--2 in *control_shell)2 in *control_shell) ,, ((),),


2x22x2

44 55 44 (( ww--mode )mode )

//

::

ELFORM=6: HughesELFORM=6: Hughes--Liu with Jaumann rate stress updateLiu with Jaumann rate stress update

BB--TT 1010


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ELFORM=7: HughesELFORM=7: Hughes--Liu with coLiu with co--rotational stress updaterotational stress update

BB--TT 55


2x22x2

(continued):(continued):

ELFORM=16:ELFORM=16: ,, coco--rotationalrotational BelytschkoBelytschko--TsayTsay

66 77 ,, BatheBathe--DvorkinDvorkin ww (( ))

BB--TT 2.52.5 33

88 (())


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))

BB--TT (())


BelytschkoBelytschko--TsayTsay

ELFORM=5:ELFORM=5: NIP=1NIP=1ELFORM=2ELFORM=2

*SECTION_SHELL*SECTION_SHELL NIP=1NIP=1

ELFORM=9:ELFORM=9: ( 4( 4 ))

7/22/201

LS-DYNA_培训教程【姜正旭MSC.Software上海办事处】

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Transcript of LS-DYNA_培训教程【姜正旭MSC.Software上海办事处】