One-dimensional sharp-phase-front-based continuum models of phase transformations in shape memory alloys

2000 ◽  
Author(s):  
Abhijit Bhattacharyya ◽  
Vesselin Stoilov
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Phase Transformations ◽  
Continuum Models ◽  
Phase Front ◽  
One Dimensional ◽  
Title One

Shape memory alloy–actuated prestressed composites with application to morphing automotive fender skirts

2018 ◽  
Vol 30 (3) ◽  
pp. 479-494 ◽  
Author(s):  
Venkata Siva C Chillara ◽  
Leon M Headings ◽  
Ryohei Tsuruta ◽  
Eiji Itakura ◽  
Umesh Gandhi ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Smart Materials ◽  
Design Procedure ◽  
Building Blocks ◽  
Smart Composite ◽  
Thermally Induced ◽  
One Dimensional ◽  
Flat Shape

This work presents smart laminated composites that enable morphing vehicle structures. Morphing panels can be effective for drag reduction, for example, adaptive fender skirts. Mechanical prestress provides tailored curvature in composites without the drawbacks of thermally induced residual stress. When driven by smart materials such as shape memory alloys, mechanically-prestressed composites can serve as building blocks for morphing structures. An analytical energy-based model is presented to calculate the curved shape of a composite as a function of force applied by an embedded actuator. Shape transition is modeled by providing the actuation force as an input to a one-dimensional thermomechanical constitutive model of a shape memory alloy wire. A design procedure, based on the analytical model, is presented for morphing fender skirts comprising radially configured smart composite elements. A half-scale fender skirt for a compact passenger car is designed, fabricated, and tested. The demonstrator has a domed unactuated shape and morphs to a flat shape when actuated using shape memory alloys. Rapid actuation is demonstrated by coupling shape memory alloys with integrated quick-release latches; the latches reduce actuation time by 95%. The demonstrator is 62% lighter than an equivalent dome-shaped steel fender skirt.

scholarly journals Phase Equilibria and Phase Transformations in New B2-type Ferromagnetic Shape Memory Alloys of Co-Ni-Ga and Co-Ni-Al Systems

2001 ◽  
Vol 42 (11) ◽  
pp. 2472-2475 ◽  
Author(s):  
Katsunari Oikawa ◽  
Takuya Ota ◽  
Fumihiko Gejima ◽  
Toshihiro Ohmori ◽  
Ryosuke Kainuma ◽  
...  
Keyword(s):  
Phase Equilibria ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Phase Transformations ◽  
Ferromagnetic Shape Memory Alloys ◽  
Ferromagnetic Shape Memory

Long-time behavior for the full one-dimensional Frémond model for shape memory alloys

2000 ◽  
Vol 12 (6) ◽  
pp. 423-433 ◽  
Author(s):  
Pierluigi Colli ◽  
Philippe Laurençot ◽  
Ulisse Stefanelli
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Time Behavior ◽  
Long Time Behavior ◽  
One Dimensional ◽  
Long Time

Optimal Control for Shape Memory Alloys of the One-Dimensional Frémond Model

2020 ◽  
Vol 41 (12) ◽  
pp. 1421-1471
Author(s):  
Pierluigi Colli ◽  
M. Hassan Farshbaf-Shaker ◽  
Ken Shirakawa ◽  
Noriaki Yamazaki
Keyword(s):  
Optimal Control ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
One Dimensional ◽  
The One

One-dimensional pseudoelastic theory of shape memory alloys

1998 ◽  
Vol 7 (4) ◽  
pp. 489-495 ◽  
Author(s):  
Toru Kamita ◽  
Yuji Matsuzaki
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
One Dimensional
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