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The Determination and Evaluation of Nitinol Constitutive Models for Finite Element Analysis

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Abstract:

Superelastic Ni-Ti (Nitinol) is a member of the shape memory alloy (SMA) family of metals. The physical properties of Nitinol are highly dependant on a number of factors, including manufacturing method, subsequent processing, operating temperature, and strain rate. These factors complicate the prescription of material constitutive models, leading to complexities in the computational analysis of Nitinol components. The current work explores the limitations in the Nitinol material model available in existing commercial finite element (FE) software using a series of specially design experimental tests and representative FE models.

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Periodical:

Applied Mechanics and Materials (Volumes 7-8)

Pages:

81-88

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.7-8.81

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Online since:

August 2007

Authors:

Emma McCummiskey, William Dempster, David Nash, T.R. Ashton, D.G. Stevenson

Keywords:

Constitutive Model, Fine Wire, Nitinol, Shape Memory Alloy Actuator, Strain Rate, Temperature Dependency, Testing

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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