Torsional behavior of shape memory alloys

Andrew C. Keefe; Gregory Paul Carman; A. Peter Jardine

doi:10.1117/12.316849

20 July 1998 Torsional behavior of shape memory alloys

Andrew C. Keefe, Gregory Paul Carman, A. Peter Jardine

Proceedings Volume 3324, Smart Structures and Materials 1998: Smart Materials Technologies; (1998) https://doi.org/10.1117/12.316849
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

This study investigates the properties of TiNi and TiNi-Cu (K- alloy) Shape Memory Alloys and their behavior in torsion (uniaxial) and combined tension-torsion (biaxial). Test results include torque versus angle curves and recovery torque versus pretwist for both uniaxial and biaxial loading. Preliminary results for low cycle fatigue are also presented. The wall thickness of the torque tube influences all of these curves considerably due to the gradation of stresses and strains through the thickness. All test data presented in this paper is for moderate torques where maximum shear strains are below 3.5% and as such represent an actuator capable of long fatigue life, based on previous experimental data for wire systems. A theoretical model for recovery torque is also described.

Citation Download Citation

Andrew C. Keefe, Gregory Paul Carman, and A. Peter Jardine "Torsional behavior of shape memory alloys", Proc. SPIE 3324, Smart Structures and Materials 1998: Smart Materials Technologies, (20 July 1998); https://doi.org/10.1117/12.316849

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