Theory-based development of high-performance magnostrictive particulate actuated polymer composite transducer materials with strongly improved cyclic strain endurance

William D. Armstrong

doi:10.1117/12.432755

11 July 2001 Theory-based development of high-performance magnostrictive particulate actuated polymer composite transducer materials with strongly improved cyclic strain endurance

William D. Armstrong

Author Affiliations +

Proceedings Volume 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics; (2001) https://doi.org/10.1117/12.432755
Event: SPIE's 8th Annual International Symposium on Smart Structures and Materials, 2001, Newport Beach, CA, United States

Abstract

The present experimental effort characterizes the development of damage in two different forms of experimental magnetostrictive composite material. This effort is intended to identify the various forms of damage mechanisms operating in the two very different materials, and to identify how the development of fine scale damage influences the overall magnetostrictive behavior and performance. Optical examination of as-magneto-strain cycled Terfenol-D particle actuated epoxy matrix composite material strongly suggests the following primary damage processes, particle fracture under cyclic internal stress, severe degradation of the particle to epoxy matrix interfacial bond, and ultimate sample failure by matrix crack coalescence leading to complete granulation.

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William D. Armstrong "Theory-based development of high-performance magnostrictive particulate actuated polymer composite transducer materials with strongly improved cyclic strain endurance", Proc. SPIE 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics, (11 July 2001); https://doi.org/10.1117/12.432755

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