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Large Deformation of Nitinol Under Shear Dominant Loading

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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.

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Acknowledgements

We gratefully acknowledge the support of the Army Research Office (W911NF-04-1-0156), the National Science Foundation (DMS-0311788) and the Powell foundation. We thank Correlated Solutions, Inc. for providing the DIC correlation software used in these experiments.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48105, USA

    S. Daly (SEM Member)

  2. Department of Mechanical Engineering, Technion, Israel Institute of Technology, 32000, Haifa, Israel

    D. Rittel (SEM Member)

  3. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA

    K. Bhattacharya & G. Ravichandran (SEM Member)

Authors
  1. S. Daly
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  2. D. Rittel
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  3. K. Bhattacharya
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  4. G. Ravichandran
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Correspondence to S. Daly.

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Daly, S., Rittel, D., Bhattacharya, K. et al. Large Deformation of Nitinol Under Shear Dominant Loading. Exp Mech 49, 225–233 (2009). https://doi.org/10.1007/s11340-008-9178-5

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  • DOI: https://doi.org/10.1007/s11340-008-9178-5

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