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Proceedings Paper

Virtual processing of hybrid SMA composites through martensitic transformation
Author(s): Brian T. Lester; Yves Chemisky; Andrew Geltmacher; Siddiq. M. Qidwei; Dimitris C. Lagoudas
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Paper Abstract

The capability of Shape Memory Alloys (SMAs) to modify the reference configuration of an SMA-composite through martensitic transformation is explored. It is intended that through careful selection of a thermomechanical loading path the composite can be "processed" such that the constituent phases are in a preferential reference configuration. Specifically, for materials which have preferred loading conditions (i.e., compression versus tension), such processing results in a residual stress state which takes advantage of the improved properties. The composite under investigation is assumed to be composed of an SMA phase and an elasto-plastic second phase. For analysis of such a composite, a Finite Element (FE) mesh based on a realistic microstructure is constructed by using the results of X-ray tomography. The resultant microstructure is analyzed using FE techniques. It is shown that through an isobaric loading path, transformation generates plastic strains in the elasto-plastic phase which modify the composite reference configuration. The effect of different applied loads is considered.

Paper Details

Date Published: 28 April 2011
PDF: 9 pages
Proc. SPIE 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011, 79781L (28 April 2011); doi: 10.1117/12.884624
Show Author Affiliations
Brian T. Lester, Texas A&M Univ. (United States)
Yves Chemisky, Texas A&M Univ. (United States)
Andrew Geltmacher, U.S. Naval Research Lab. (United States)
Siddiq. M. Qidwei, U.S. Naval Research Lab. (United States)
Dimitris C. Lagoudas, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 7978:
Behavior and Mechanics of Multifunctional Materials and Composites 2011
Zoubeida Ounaies; Stefan S. Seelecke, Editor(s)

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