Frequency characteristics of pseudoelasticity of shape memory alloys
説明
We performed an experiment of pseudoelastic ity of a NiTi shape memory alloy wire for measuring stress-strain-temperature relations at loading frequency of from 0.001 to 1.0 Hz and determined numerically the phase interaction energy function proposed in our previous studies on a onedimensional thermodynamic model of shape memory alloys. Then, using the phase interaction energy function determined, we carried out a simulation analysis of pseudoelastic transformation of the wire, in which thermomechanical interactions such as latent heat, energy dissipation and heat transfer are accounted for. Numerical results show that the loading frequency is influential to the change in the stress-strain-temperature of the wire. A good agreement between the experiment and numerical results is obtained, and the effectiveness of our thermodynamic model of pseudoelastic ity proposed in the previous studies has been confirmed.
収録刊行物
-
- 19th AIAA Applied Aerodynamics Conference
-
19th AIAA Applied Aerodynamics Conference 2001-06-11
American Institute of Aeronautics and Astronautics (AIAA)