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Proceedings Paper

Model and constitutive equation describing the hysteretic behavior of single crystals in Cu-Zn-Al SMA: from single plate to a collective behavior
Author(s): Vicenc Torra; Antonio Isalgue; Francisco C. Lovey
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Paper Abstract

The experimental observations in single crystals determine the local behavior of a martensite plate via nucleation, intrinsic thermoelasticity/pseudoelasticity, interface friction, growth and interaction with neighbor plates until coalescence. The thermomechanical behavior of a great group of martensite plates of the same variant in a single crystal can be established via the plate average behavior. The Clausius-Clapeyron equation is the link between force (or stress) and temperature. Starting from the experimental analysis a representative model (time independent) can be constructed. After an identification of the mean values, the hysteresis cycle and the internal loops can be predicted. Avoiding the classical fatigue effects, an evaluation of the time effects is realized. The characteristic of the local evolution associated to the coexistence among the phases and, also, the time and temperature actions related to the long time permanence in parent phase are ascertained.

Paper Details

Date Published: 21 August 2001
PDF: 12 pages
Proc. SPIE 4326, Smart Structures and Materials 2001: Modeling, Signal Processing, and Control in Smart Structures, (21 August 2001); doi: 10.1117/12.436497
Show Author Affiliations
Vicenc Torra, Univ. Politecnica de Catalunya (Spain)
Antonio Isalgue, Univ. Politecnica de Catalunya (Spain)
Francisco C. Lovey, Institute Balseiro-Ctr. Atomico de Bariloche (Argentina)

Published in SPIE Proceedings Vol. 4326:
Smart Structures and Materials 2001: Modeling, Signal Processing, and Control in Smart Structures
Vittal S. Rao, Editor(s)

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