Ansys Mechanical PostProcessing

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    © 2010 ANSYS, Inc. All rights reserved. 1  ANSYS, Inc. Proprietary

    © 2010 ANSYS, Inc. All rights reserved. 1  ANSYS, Inc. Proprietary

    Ask-The-ExpertsANSYS Webinar 

    Advanced Post-

    Processing with

    ANSYS Mechanical

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    © 2010 ANSYS, Inc. All rights reserved. 2  ANSYS, Inc. Proprietary

    Agenda

    • Displaying Results  –  Contour Plots

    • Probing Results

     –  Probing Contour Results

     –  Probing Reaction Forces, Joints, Bolt Pretension,Beams

    • Mapping Results onto Paths

     –  Existing Geometry

     –  Construction Geometry (Paths and Surfaces)

    • Linearized Results • Beam Results

    • Charts – Stress-Strain, Force-Deflection

    • User Defined Results

    • Coming at ANSYS 13.0

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    © 2010 ANSYS, Inc. All rights reserved. 3  ANSYS, Inc. Proprietary

    Contour Plots

    • At Release 12.1, users have the following options while displaying contour plots for results like stresses, strains, etc. (not available for DOF results eg: Deformations)

    • Unaveraged: Displays unaveraged results.

    • Averaged: Displays averaged results. (Default)

    • Nodal Difference: Computes the maximum differencebetween the unaveraged computed result (for example, total

    heat flux, equivalent stress) for all elements that share a

    particular node.

    • Nodal Fraction: Computes the ratio of the nodal difference

    and the nodal average.

    • Elemental Difference: Computes the maximum difference

    between the unaveraged computed result (for example, total

    heat flux, equivalent stress) for all nodes in an element,

    including midside nodes.

    • Elemental Fraction: Computes the ratio of the elemental

    difference and the elemental average.

    • Elemental Mean: Computes the elemental average from the

    averaged component results.

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    © 2010 ANSYS, Inc. All rights reserved. 4  ANSYS, Inc. Proprietary

    Legends

    • Use “Adjust to Visible” to update the legend

    to include only “Visible” elements after

    slicing a model

    Max Stress on Entire Model (232.17Mpa)

    and Max. Stress Location

     Adjust to Visible After Model

    Slicing

    New Max. Stress (150.08Mpa) and Max.

    Stress Location

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    Probing Results

    • The Probe Tool allows you to scope a result objectto a location and make that result parametric.

    • The Probe Tool can be scoped to geometry, a local coordinate system or using a remote point.

    • The orientation of the result item can be with respect to global or local coordinate systems.

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    © 2010 ANSYS, Inc. All rights reserved. 6  ANSYS, Inc. Proprietary

    • Probe Tool example:

     –  Local coordinate system defined as shown

     –  Probe located at local CS

     –  Stress results (all) requested

    Local CS

    Probe Location

    Probing Results

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    • Probe Tools can also be used to extract force reactions at supports and

    Joints

    Choose Force/Moment Reaction

    Force Reactions can be obtained for the

    items listed above

    For Boundary Condition, all supports usedin the model will be listed

    Reaction Forces at boundary condition

    Probing Results

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    Choose Joint Reaction for Joints

    For Bolt Working Loads (Reactions),

    Choose Bolt Pretension Select the bolt

    Probing Results

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    Existing Geometry

    • Paths Plots can be obtained on edges

    available on the geometry

     – Scope the results to the selected edge(s)

     –  Retrieve the results

    Scope Results to Existing Edges

    Path Plot of Deformation for Selected Edge

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    Construction Geometry

    • Paths can be created using one of three available methods:

     – Two points (each point can be a vertex, or a picked one through x,y,z picking on geometry

    or directly specified by three coordinates in the details window)

     – Edge (an existing geometry edge)

     – 

    X axis intersection (using a coord system –specially suited for linearized stress results)

    • Surfaces can only be created using coordinate systems

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    Construction Geometry  – Paths

    • Examples of creating Construction Geometry using Paths

    Path Created Using Coordinate Systems

    Path on Existing Edge Path Using Two Vertices

    Path Defined by X Axis Intersection

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    Construction Geometry  – Paths

    • Path results may be displayed in graphical form.

    • The X axis may be displayed as path location (S) or time (transient analyses).

    Path Plot Using Construction Geometry – Notice the Discontinuity in the Path Plot Due to it Passing Through Holes

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    Construction Geometry  – Paths

    • Snap to Mesh Feature : When Solving for linearized stresses, it is important to make sure that the path constructed passes through the nodes on the model (not just the geometry). To ensure that the path passes through the mesh:

    Set “Show Mesh” to “Yes”

    Right Mouse Click – Snap to Mesh Nodes

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    Construction Geometry  – Surface

    • Users can define arbitrary section planes to retrieve results

     – Create a local coordinate system

     – For the surface:

    • For a Cartesian coordinate system, the surface is theintersection of the model with the X-Y plane of the coordinate system

    • For a cylindrical coordinate system, the surface is the intersection of the model with the cylinder whose axis is the Z axis of the coordinate system. In this case, you

    must specify the radius in the Details view of the Surfaceobject

     –  Add a standard result object

     – Set the scoping method to surface

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    Construction Geometry  – Surface

    Create Local Coordinate System

    Set the Surface to Reference Local CS

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    Construction Geometry  – Surface

    Preview Surface Location on Geometry

    View Results on Surface

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    Linearized Results

    • The Linearized Stress results calculate membrane, bending, peak, and total stress along a

    straight line path in the Mechanical application • To Calculate Linearized Stresses

     –  Define a Path (Should not Pass Through Holes)

     –  On the Solution toolbar, click Linearized Stress, and then click the stress you want to calculate

     –  In the Details view, select the Path you have defined to calculate the linearized stress

     –  Select the coordinate system you have used for the model

     – 

    Click Solve to calculate linearized stress along the path

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    Beam Results

    • Results for beams are obtained by using the Beam Tool • The following results are available:

     –  Direct Stress: The stress component due to the axial load encountered in a beam element

     –  Minimum Bending Stress: From any bending loads a bending moment in both the local Y and Z directions will arise. This leads to the following four bending stresses: Y bending stress on top/bottom and Z bending stress the top/bottom. Minimum Bending Stress is the minimum of these four bending stresses