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TECHNICAL PAPERS

Bending of Superelastic Wires, Part I: Experimental Aspects

[+] Author and Article Information
B. T. Berg

Army High Performance Computing Research Center, University of Minnesota, Minneapolis, MN 55455

J. Appl. Mech 62(2), 459-465 (Jun 01, 1995) (7 pages) doi:10.1115/1.2895952 History: Received January 19, 1993; Revised March 08, 1994; Online October 30, 2007

Abstract

A pure-bending apparatus is used to measure the constitutive relationship between applied pure bending moments and the resulting curvatures of a few superelastic alloy wires. The sample nickel-titanium alloy (NiTi) wires change phase when ample bending moments are imposed. Like the material’s uniaxial tension stress-strain relationship, the measured moment-curvature relationship shows plateaus of constant moment and hysteresis. The bent shape is circular, except in the mixed phase region where it is composed of a phase mixture of circles. An example of the applications of the measured moment-curvature relations is presented in Part II of this paper where the three-point bending problem is considered.

Copyright © 1995 by The American Society of Mechanical Engineers
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