The sizes of the transformed (both partially and fully) and plastic regions are numerically evaluated by solving a system of integral equations and their sensitivity to the transformation characteristics (i.e., maximum transforma- tion strain and temperature) is determined. For remote stress levels above the critical value, the fully-transformed material near a crack tip is assumed to yield plastically. Closed form expressions for the size of the partial transformation zone, crack opening displacement and J-integral are given for this case. It is found for low remote stress values-less than a critical value-that the SMA is not fully transformed in the vicinity of a crack tip. The analysis follows closely the Dugdale–Barenblatt model developed for conventional metals. The problem of a center plane crack in an infinite, thin, pseudoelastic Shape Memory Alloy (SMA) plate subjected to an in-plane uniform ten- sile stress at infinity is analyzed.
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