Pseudo-elastic hysteresis of shape-memory wires for passive structural damping: theory and experiments

Peter Thomson; Gary J. Balas; Perry H. Leo

doi:10.1117/12.174107

1 May 1994 Pseudo-elastic hysteresis of shape-memory wires for passive structural damping: theory and experiments

Peter Thomson, Gary J. Balas, Perry H. Leo

Proceedings Volume 2193, Smart Structures and Materials 1994: Passive Damping; (1994) https://doi.org/10.1117/12.174107
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

Experimental results of the dynamics of a cantilever beam constrained by shape memory wires are presented. It is observed that the damping increases significantly when the shape memory wires are pre-stressed such that they lie within the pseudoelastic hysteresis loop. Theoretical models of the inner hysteresis loop are considered, and modal analysis is used to obtain the dynamic response of the system. Simulations of the system using these models give theoretical values of damping which agree well with those observed experimentally. The proposed models of the pseudoelastic hysteresis loop are sufficient to obtain an estimate of the initial increase of damping due to the use of pre-stressed shape memory wires in structures. These results demonstrate that pseudoelasticity of shape memory wires can be used to significantly augment passive damping in structural systems.

Citation Download Citation

Peter Thomson, Gary J. Balas, and Perry H. Leo "Pseudo-elastic hysteresis of shape-memory wires for passive structural damping: theory and experiments", Proc. SPIE 2193, Smart Structures and Materials 1994: Passive Damping, (1 May 1994); https://doi.org/10.1117/12.174107

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