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Finite Element Martensite Ratio Derivation on NiTi via Measurable Criteria of Strain Rate

[+] Author Affiliations
Abbas Amini, Hamid Mehdigholi

Sharif University of Technology, Tehran, Iran

Mohammad Elahinia

Toledo University, Toledo, OH

Paper No. SMASIS2009-1452, pp. 641-647; 7 pages
doi:10.1115/SMASIS2009-1452
From:
  • ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Active Materials, Mechanics and Behavior; Modeling, Simulation and Control
  • Oxnard, California, USA, September 21–23, 2009
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4896-8 | eISBN: 978-0-7918-3857-0
  • Copyright © 2009 by ASME

abstract

The shape memory alloys (SMAs) and smart composites have a large use in high and low level industry, while a lot of research is being done in this field. The existence of smart composite structures is because of the advance mechanical benefits of the above materials. This work refers to dynamic and quasi static nonlinear explanation of these materials. After mathematical model consideration on the rate of strain, a model which is about martensite ratio of NiTi has been presented. This work has been done because of the high sensitivity of these materials to strain rate and use of visual and measurable engineering criteria to access other variables. As the martensite ratio is not engineering measurable amount, it needs to have macro scale property to measure this important nano scale criteria. Relative experiments are done to show the rate dependency of NiTi.

Copyright © 2009 by ASME

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