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Numerical Simulation for the Quasi-static Behavior of Superelastic Nitinol Shape Memory Alloys (SMAs)
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 Title & Authors
Numerical Simulation for the Quasi-static Behavior of Superelastic Nitinol Shape Memory Alloys (SMAs)
Hu, Jong Wan;
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Superelastic shape memory alloys (SMAs) are metallic materials that can automatically recover to their original condition without heat treatment only after the removal of the applied load. These smart materials have been wildly applied instead of steel materials to the place where large deformation is likely to concentrate. In spite of many advantages, superelastic SMA materials have been limited to use in the construction filed because there is lack of effort and research involved with the development of the material model, which is required to reproduce the behavior of superelastic SMA materials. Therefore, constitutive material models as well as algorithm codes are mainly treated in this study for the purpose of simulating their hysteretic behavior through numerical analyses. The simulated curves are compared and calibrated to the experimental test results with an aim to verify the adequacy of material modeling. Furthermore, structural analyses incorporating the material property of the superelastic SMAs are conducted on simple and cantilever beam models. It can be shown that constitutive material models presented herein are adequate to reliably predict the behavior of superelastic SMA materials under cyclic loadings.
Shape memory alloy (SMA);Superelastic behavior;Constitutive material model;Numerical analysis;
 Cited by
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