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13 August 2003 Micromechanical approach of stress-induced phase transformation
Etienne Patoor
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Proceedings Volume 5053, Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics; (2003) https://doi.org/10.1117/12.498561
Event: Smart Structures and Materials, 2003, San Diego, California, United States
Abstract
Stress-induced martensitic phase transformation is responsible of very important phenomena like superelasticity or two-way shape memory in shape memory alloys. These phenomena are at the origin of many innovative products in industrial fields like aerospace or biomedical applications. To reach the best design is a very difficult task for applications using shape memory alloys: due to the existence of a phase transformation, these materials can no longer be considered as homogeneous and macroscopic approaches failed to give an accurate description of their behavior. The recent trend using SMA thin film as microactuator in microdevice increase the need of reliable design tools. Moderns concepts developed in micromechanics and finite element analysis are well adapted to deal with these problems. Intra and intergranular stresses building from transformation strain incompatibilities in bulk materials or thin films are well accounted using these tools, even when complex loading conditions or different initial crystallographic texture are considered.
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Etienne Patoor "Micromechanical approach of stress-induced phase transformation", Proc. SPIE 5053, Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics, (13 August 2003); https://doi.org/10.1117/12.498561
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KEYWORDS
Crystals
Shape memory alloys
Thin films
Finite element methods
Transform theory
Homogenization
Lithium
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