ICAMS / Interdisciplinary Centre for Advanced Materials Simulation
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An accurate, fast and stable material model for shape memory alloys

P. Junker.

Smart Materials and Structures, 23, (2014)

Abstract
Shape memory alloys possess several features that make them interesting for industrial applications. However, due to their complex and thermo-mechanically coupled behavior, direct use of shape memory alloys in engineering construction is problematic. There is thus a demand for tools to achieve realistic, predictive simulations that are numerically robust when computing complex, coupled load states, are fast enough to calculate geometries of industrial interest, and yield realistic and reliable results without the use of fitting curves. In this paper a new and numerically fast material model for shape memory alloys is presented. It is based solely on energetic quantities, which thus creates a quite universal approach. In the beginning, a short derivation is given before it is demonstrated how this model can be easily calibrated by means of tension tests. Then, several examples of engineering applications under mechanical and thermal loads are presented to demonstrate the numerical stability and high computation speed of the model. © 2014 IOP Publishing Ltd.


Keyword(s): identification (control systems); shape memory effect; material modeling; thermo-mechanical coupling; variational modeling; finite element method
Cite as: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907900116&doi=10.1088%2f0964-1726%2f23%2f11%2f115010&partnerID=40&md5=2928c255c7d29df27130e49387afb599
DOI: 10.1088/0964-1726/23/11/115010
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