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Proceedings Paper

Stress-optimised shape memory microactuator
Author(s): K. D. Skrobanek; Manfred Kohl; Shuichi Miyazaki
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Paper Abstract

A shape memory membrane actuator has been developed, which consists of stress-optimized microfabricated NiTi beam-cantilever devices of 100 micrometers thickness. For stress- optimization, the lateral widths of the beams have been designed for homogeneous stress distributions without local stress maxima, allowing a maximum use of active material for bending actuation. As a result, higher work outputs for a given stress level and smaller hystereses are obtained compared to non-optimized actuators with parallel beam-cantilever devices. Thus, improved hysteresis control is possible and better lifetime characteristics are expected. For a strain limit of 2% the achieved work output is about 24 (mu) Nm.

Paper Details

Date Published: 26 April 1996
PDF: 6 pages
Proc. SPIE 2779, 3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials, (26 April 1996); doi: 10.1117/12.237168
Show Author Affiliations
K. D. Skrobanek, Forschungszentrum Karlsruhe/IMT (Germany)
Manfred Kohl, Forschungszentrum Karlsruhe/IMT (Germany)
Shuichi Miyazaki, Univ. of Tsukuba (Japan)


Published in SPIE Proceedings Vol. 2779:
3rd International Conference on Intelligent Materials and 3rd European Conference on Smart Structures and Materials

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