Thermomechanical characterization of shape memory alloy torque tubes

Andrew C. Keefe; Gregory Paul Carman

doi:10.1117/12.352811

12 July 1999 Thermomechanical characterization of shape memory alloy torque tubes

Andrew C. Keefe, Gregory Paul Carman

Proceedings Volume 3675, Smart Structures and Materials 1999: Smart Materials Technologies; (1999) https://doi.org/10.1117/12.352811
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

The thermo-mechanical characteristics of four NiTi based SMA torque tubes are investigated under simple torsional loading. Results from the thermo-mechanical tests are presented for samples when fully martensitic, fully austenitic, and recovery torque measurements. Test results indicate that wall thickness plays a prominent role in the results. An analytical model was developed as a function of geometry and experimentally determined material properties. The model predicts the torque versus angular deformation for a wide range of tube geometries when in martensite and austenite. The distribution of strain through the thickness is assumed to vary non-linearly as an exponentially with the radius. The analytical results reflect the mechanical behavior reasonably well.

Citation Download Citation

Andrew C. Keefe and Gregory Paul Carman "Thermomechanical characterization of shape memory alloy torque tubes", Proc. SPIE 3675, Smart Structures and Materials 1999: Smart Materials Technologies, (12 July 1999); https://doi.org/10.1117/12.352811

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