Investigation on Stress Field near Crack-Tip of Mode I in Shape Memory Alloy

Bo Zhou; Xiao Gang Guo; Gang Ling Hou; Xu Kun Li

doi:10.4028/www.scientific.net/AMM.142.138

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 142Investigation on Stress Field near Crack-Tip of...

Investigation on Stress Field near Crack-Tip of Mode I in Shape Memory Alloy

Abstract:

In this paper a phase transformation equation is supposed to describe the phase transformation behaviors of the shape memory alloy (SMA) under complex stress state. The stress field near crack-tip of mode I in SMA at various temperatures is investigated based on the supposed phase transformation equation and linear elastic fracture mechanics. Results show both the martensite region and the mixed region of martensite and austenite near the crack-tip become larger with the decrease of temperature. The fracture mechanics behaviors of SMA are much influenced by the temperature.