Comprehensive Modeling of Shape Memory Alloy Material Response Using a Multimechanism-Based Inelastic Model
Publication: Journal of Aerospace Engineering
Volume 22, Issue 4
Abstract
Despite significant work over many years, using either one of the micromechanics based or phenomenological approaches, there are still prospects of much improvement to be made in constitutive modeling of shape memory alloys (SMAs). This is especially true if we sufficiently target the general scope in the modeling, i.e., including such important attributes as (1) multiaxiality; (2) possible asymmetry in tension and compression; (3) accounting for pseudoelasticity and pseudoplasticity; (4) rate dependence; and (5) effects of shape memory training under cyclic loading. The desire for comprehensive modeling of SMA materials provides the primary motivation for the inelastic model described here. Its theoretical formulation employs two main ingredients: (1) multiplicity of hardening mechanisms and (2) the partition of the energy storage/dissipation that is so vital in capturing the extremes of pseudoelasticity and pseudoplasticity in SMAs. For the purpose of validation and assessment part of the model capabilities, we report the results of a large number of simulations that were inspired by recent experimental test results under both monotonic and cyclic as well as uniaxial and multiaxial stress conditions.
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Information & Authors
Information
Published In
Journal of Aerospace Engineering
Volume 22 • Issue 4 • October 2009
Pages: 438 - 444
Copyright
© 2009 ASCE.
History
Received: Sep 12, 2008
Accepted: Apr 10, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
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