Experimental characterization of NiMnGa ferromagnetic shape memory alloy bars under variable loading conditions

Ronald N. Couch; Inderjit Chopra; Manfred R. Wuttig

doi:10.1117/12.474684

Translator Disclaimer

15 July 2002 Experimental characterization of NiMnGa ferromagnetic shape memory alloy bars under variable loading conditions

Ronald N. Couch, Inderjit Chopra, Manfred R. Wuttig

Author Affiliations +

Proceedings Volume 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems; (2002) https://doi.org/10.1117/12.474684
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

Abstract

A comprehensive experimental characterization of single crystal, martensite, NiMnGa rods is the current subject of study. Preliminary actuator force-displacement curves for DC magnetic fields up to 0.6 T in the static regime have been developed. A peak static actuation force of 5.5N at 0.4 mm in was observed. The effects AC magnetic fields below magnetic saturation were also examined. The dynamic force-displacement characteristics of the NiMnGa alloy in the presence of mechanical preloads was studied. Dynamic testing at AC fields of 0.3 T yielded strains of up to 1.2% and dynamic loads of up to 7 N. A possible material dependence on strain-rate and was observed from the experimental dynamic stress-strain curves.

Citation Download Citation

Ronald N. Couch, Inderjit Chopra, and Manfred R. Wuttig "Experimental characterization of NiMnGa ferromagnetic shape memory alloy bars under variable loading conditions", Proc. SPIE 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems, (15 July 2002); https://doi.org/10.1117/12.474684

ACCESS THE FULL ARTICLE