The limitations of electrical resistance for accurate positioning of shape-memory actuators: The case of well-oriented CuZnAl single-crystals under uniaxial loading
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- 作者：G. Bertolino ; bertolin@cab.cnea.gov.ar ; A. Yawny ; J.L. Pelegrina
- 关键词：Martensitic transformations ; Electrical resistance ; Actuators ; Positioning
- 刊名：Materials & Design
- 出版年：2017
- 出版时间：5 March 2017
- 年：2017
- 卷：117
- 期：Complete
- 页码：316-325
- 全文大小：1385 K
- 卷排序：117
文摘
The use of electrical resistance as a feedback signal for positioning of shape memory based actuators is critically revised. A physics-based model relating electrical resistance variation with strain for a single crystal benchmark case is presented. Even in the simplest case, a straightforward accurate correlation between strain and electrical resistance does not exist. Guidelines for selection of a shape memory material for actuator positioned through the electrical resistance are formulated.