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 language||English (US)|
|Number of pages||9|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|State||Published - May 1 1994|
|Event||Smart Structures and Materials 1994: Passive Damping - Orlando, United States|
Duration: Feb 13 1994 → Feb 18 1994
Bibliographical noteFunding Information:
The authors wish to acknowledge the generous financial support from NSF (ECS-9110254), NASA Langley Control/Structure Interaction Group (NAG-1-821), and the University of Minnesota Graduate Research Fellowship Program.
The authors wish to acknowledge the generous financial support from NSF (ECS-9110254), NASA Langley Con-trol/Structure Interaction Group (NAG-1-821), and the University of Minnesota Graduate Research Fellowship Program.
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