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Proceedings Paper

Numerical studies of wave propagation in polycrystalline shape memory alloy rods
Author(s): Dimitris C. Lagoudas; Peter Popov
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Paper Abstract

Shape Memory Alloys (SMAs) have recently been considered for various applications involving dynamic loading. An SMA body subjected to external dynamic loading will experience large inelastic deformations that will propagate as phase transformation and/or detwinning shock waves. The wave propagation problem in a cylindrical SMA is studied numerically. An adaptive Finite Element Method (FEM) is used to solve several model problems representing various boundary conditions and thermomechanical paths. The mesh adaptivity is based on the Zienkiewicz-Zhu (ZZ) error estimator. Convergence studies are performed demonstrating the ability of the adaptive FEM to accurately and efficiently capture solutions with moving shock discontinuities. The energy dissipation capabilities of SMA rods are evaluated based on the numerical simulations. Correlations with existing experimental data on impact loading of NiTi SMA bars are also performed.

Paper Details

Date Published: 13 August 2003
PDF: 11 pages
Proc. SPIE 5053, Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics, (13 August 2003); doi: 10.1117/12.484684
Show Author Affiliations
Dimitris C. Lagoudas, Texas A&M Univ. (United States)
Peter Popov, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 5053:
Smart Structures and Materials 2003: Active Materials: Behavior and Mechanics
Dimitris C. Lagoudas, Editor(s)

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