|
|||||
|
|
A thermodynamic finite-strain model for pseudoelastic shape memory alloys |
|
| Institution: | 1. State Key Lab of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China;2. Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China;3. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, United States;4. Department of Materials Science and Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka 565-0871, Japan;5. Departament de Física Quàntica i Astrofísica, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, Barcelona, Catalonia E-08028, Spain;6. Departament de Física de la Matèria Condensada, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, Barcelona, Catalonia E-08028, Spain |
| Abstract: | A thermodynamic finite-strain model describing the pseudoelastic response of shape memory alloys is proposed. The model is based on a self-consistent Eulerian theory of finite deformations using the logarithmic rate. Purely elastic material response is derived from a hyperelastic potential. The mass fraction of martensite is introduced as internal state variable to indicate the thermomechanical state of the phase transforming material. The evolution of martensite is governed by a kinetic law which is derived from the Helmholtz free energy of the two-phase solid and takes the heat generated during phase transition into account. The material model is implemented into a finite element code in an updated Lagrangian scheme and calibrated to experimental data. Simulations under different loading conditions illustrate the characteristics of the model. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |