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Large Deformation of Nitinol Under Shear Dominant Loading |
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| Authors: | S Daly D Rittel K Bhattacharya G Ravichandran |
| Institution: | (1) Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48105, USA;(2) Department of Mechanical Engineering, Technion, Israel Institute of Technology, 32000 Haifa, Israel;(3) Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA |
| Abstract: | Full-field quantitative strain maps of phase transformation and plasticity in Nitinol under large shear-dominated deformation are presented. To achieve a shear-dominated deformation mode with relatively uniform stresses and strains, a shear compression specimen (SCS) geometry was utilized. Shear deformation appears to impede the development of the strain localization during phase transformation that is seen in uniaxial testing. The shear-dominant deformation of Nitinol in the plastic regime exhibits low hardening and results in the development of significant strain inhomogeneity. |
| Keywords: | Shape-memory alloy Nitinol Shear Digital image correlation |
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