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Variational Asymptotic Analysis of a Self-healing SMA Composite

Sharma, Arvind Kumar and Student, Graduate and Harursampath, Dinesh Kumar (2008) Variational Asymptotic Analysis of a Self-healing SMA Composite. In: EngOpt 2008 - International Conference on Engineering Optimization, Rio de Janeiro, Brazil, Brazil.

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Abstract

A Shape Memory Alloy (SMA) wire reinforced composite shell structure is analyzed for self-healing characteristic using Variational Asymptotic Method (VAM). SMA behavior is modeled using a onedimensional constitutive model. A pre-notched specimen is loaded longitudinally to simulate crack propagation. The loading process is accompanied by martensitic phase transformation in pre-strained SMA wires, bridging the crack. To heal the composite, uniform heating is required to initiate reverse transformation in the wires and bringing the crack faces back into contact. The pre-strain in the SMA wires used for reinforcement, causes a closure force across the crack during reverse transformation of the wires under heating. The simulation can be useful in design of self-healing composite structures using SMA. Effect of various parameters, like composite and SMA material properties and the geometry of the specimen, on the cracking and self-healing can also be studied.

Item Type: Conference Paper
Keywords: VAM;SMA;Self-healing;Composite;shell
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 27 Sep 2011 10:02
Last Modified: 27 Sep 2011 10:02
URI: http://eprints.iisc.ernet.in/id/eprint/40947

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