A Constitutive Description for Shape Memory Alloys with Phase Transformation Microstructure

Wei Guo Li; Xiang He Peng; Wen Li Pi

doi:10.4028/www.scientific.net/AMM.52-54.192

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 52-54A Constitutive Description for Shape Memory Alloys...

A Constitutive Description for Shape Memory Alloys with Phase Transformation Microstructure

Abstract:

An incremental form of constitutive model is proposed for shape memory alloys using the modified strain based on experimental results and the finite element analysis, taking into account of the laminar microstructure, the thickness of martensite phase lamina and the interaction between the two phases. The pseudoelastisity of NiTi shape memory alloy micro-tube subjected to pure tension and pure torsion are analyzed and compared with the experimental results respectively. It can be seen that the pseudoelastic behavior, especially the stress drop during tension processes, can be well described with the proposed model.

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Periodical:

Applied Mechanics and Materials (Volumes 52-54)

Pages:

192-197

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.52-54.192

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Online since:

March 2011

Authors:

Wei Guo Li, Xiang He Peng, Wen Li Pi

Keywords:

Constitutive Model, Laminar Microstructure, Modified Strain, Pseudoelasticity, Shape Memory Alloy Actuator

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