Pseudelastic hysteresis of shape memory wires for passive structural damping: Theory and experiments

P. Thomson, G. J. Balas, P. H. Leo

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)316-324
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2193
DOIs
StatePublished - May 1 1994
EventSmart Structures and Materials 1994: Passive Damping - Orlando, United States
Duration: Feb 13 1994Feb 18 1994

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