108 Simulation of an Austenite-Twinned-Martensite ... - NIST
Nabtesco poster-2 page - University of Washington Poster.pdf · 2012. 2. 22. · UW - Center for...
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UW - Center for Intelligent Materials and Systems Minoru Taya, Robert Liang Nabtesco Project Design of Actuators Based on Ferromagnetic Shape Memory Alloys (FSMA) and its Composites with application to airborne actuators and biomedical devices Goals of Nabtesco Actuators Laboratory at University of Washington, Mechanical Engineering: 1. Design a set of new Airborne Actuators based on new design principles such as bioinspired active materials 2. Design compact and high power airborne actuators based on fast-responsive ferromagnetic shape memory alloy (FSMA) and its composite. 3. Develop a set of new applications of FSMA and FSMA composite actuators, such as biomedical fields with example of nanohelix FePd actuators for cancer diagnosis and treatment 4. Educate ME undergraduate and graduate students, and interns from Nabtesco Corp with the above knowledge. Horned beetle wing folding sequence, from expanded wing (left) to folding (right) [Nomura, 2010]. Bald eagle flying patterns, (a) cruising, (b) flapping, (c) slow down [Taya, 2006] Emergence process of flying dragon (Anax parthenope Julius) [Kishimoto and Natori, 2006 ]. Folding of European weed leaf exhibits large morphing, (a) zoom up of the upper part of the leaf with expanded motor cells, (b)-(e) sequence of expansion
Transcript of Nabtesco poster-2 page - University of Washington Poster.pdf · 2012. 2. 22. · UW - Center for...
UW - Center for Intelligent Materials and Systems
Minoru Taya, Robert Liang
Nabtesco Project
Design of Actuators Based on Ferromagnetic Shape Memory Alloys (FSMA) and its Composites with application to airborne actuators and biomedical devices
Goals of Nabtesco Actuators Laboratory at University of Washington, Mechanical Engineering: 1. Design a set of new Airborne Actuators based on new design principles such as bioinspired active materials 2. Design compact and high power airborne actuators based on fast-responsive ferromagnetic shape memory alloy (FSMA) and its composite. 3. Develop a set of new applications of FSMA and FSMA composite actuators, such as biomedical fields with example of nanohelix FePd actuators for cancer diagnosis and treatment 4. Educate ME undergraduate and graduate students, and interns from Nabtesco Corp with the above knowledge.
Horned beetle wing folding sequence, from expanded wing (left) to folding (right) [Nomura, 2010].
Bald eagle flying patterns, (a) cruising, (b) flapping, (c) slow down [Taya, 2006]
Emergence process of flying dragon (Anax parthenope Julius) [Kishimoto and Natori, 2006 ].
Folding of European weed leaf exhibits large morphing, (a) zoom up of the upper part of the leaf with expanded motor cells, (b)-(e) sequence of expansion
UW - Center for Intelligent Materials and Systems
Mag
netic
Fiel
d (H
)
austenite phase
Stress (σ)
Temperature (T)
martensite phase
Alm
ost p
aral
lel
The effect of uniform (constant) magnetic field is very small
3D-phase diagram
Fundamentals of FSMA and its composite
0
40
80
120
0 50 100 150
Temperature (°˚C)
You
ng’s
mod
ulus
(GPa
)
Ms-50
martensite phase
austenite phase
0
40
80
120
00 50 100 150
Temperature (°˚C)
You
ng’s
mod
ulus
(GPa
)
Ms-50
martensite phase
austenite phase
imi
tij,j vρfσ =+
ijpj
mi HMf ,0µ=
Demo of hybrid mechanism
CCD Camera
Top View
magnetic field
Side View
Solenoid Magnet
Fe-PdFe
Stroke
ZX
Y
ZX
YY
XZ
YX
Z
Fe-Pd
magnetic field
FeA B
Fe-PdFe
7 mmstroke
5 mm
Solenoid Magnet
• FePd is the best actuator material based on the hybrid mechanism, however, Pd is very expensive. • FSMA composite made of superelastic SMA and ferromegntic soft iron is the economically alternative material while keep the same performance as FePd FSMA.
Fe-Pd spring
Hybrid magnet
(a) 0A (b) 1A (c) 3A
5 cm
50
100
150
200
250
50 100 150 200 250 300
Frequency (Hz)
Flow
Vel
ocity
(m/s
)
0.20.3
0.4
Thickness (mm) of NiTi diaphragm
slotelectromagnetelectromagnet
FSMA composite diaphragm
FePd FSMA spring linear actuator
FSMA composite based synthetic jet actuator (SJA)
Hybrid mechanism of FSMA:Chain-reaction: Applied magnetic field gradient
→ magnetic force→ Stress-induced martensite transformation→ low stiffness of FePd→ large deformation
Hybrid mechanism of FSMA:Chain-reaction: Applied magnetic field gradient
→ magnetic force→ Stress-induced martensite transformation→ low stiffness of FePd→ large deformation
Side view of the spring actuator
Electro Magnet
YokeWorks as Yoke
First turn(works as Yoke)
FSM
A sp
ring
Yoke
Applied DC current
Side view of the spring actuator
Electro Magnet
YokeWorks as Yoke
First turn(works as Yoke)
FSM
A sp
ring
Yoke
Applied DC current
Superelastic TiNi tubeFerromagnetic core Mt
Mt
l
θ
DDfm
Superelastic TiNi tubeFerromagnetic core Mt
Mt
l
θ
DDfm
Stress inducedtransformation
τSIMτTiNi
τfm
τ
Stress inducedtransformation
τSIMτTiNi
τfm
τ
FSMA composite
• FePd spring actuator is the first demo of hybrid mechanism. • The spring stroke can be controlled by the electrical current.
courtesy from Boeing
Stress distribution
Stress inducedtransformation
σSIM
σTiNi
σfm σys
σ
Superelastic TiNi layer
Ferromagnetic layerSuperelastic TiNi layer
Stress distribution
Stress inducedtransformation
σSIM
σTiNi
σfm σys
σ
Superelastic TiNi layer
Ferromagnetic layerSuperelastic TiNi layer
• FSMA is potential as the fast responsive actuator material to be driven by magnetic field. • The best driving mechanism of FSMA is hybrid mechanism that can produces large strain yet moderate block force caused by the magnetic field gradient.
A strong synthetic jet flow is produced by FSMA composite based SJA to aim at improving the aerodynamic performance of aircrafts.
Fe: saturated magnetization (Ms) = 1.8 ×106 Amp/m, E = 210 GPa Fe-Pd (in austenite phase) : Ms = 1.6 ×106 Amp/m, EA = 70 GPa
Ferromagnetic Shape Memory Alloy (FSMA): Fast-Response and High Power Active Material
