In this paper the plastic stress intensity factor (SIF) is used to study the coupling effects of loading biaxiality, material properties and cracked body configuration in both the small- and large-scale yielding ranges. A finite element (FE) analysis is performed for a cracked Mode I plane strain plate subjected to biaxial tension/compression loading. The governing parameter of the elastic–plastic crack-tip stress field In factor at the crack tip, J-integral, and the plastic SIF, are calculated as a functions of loading biaxiality and applied stress levels. Special emphasis is put on the behavior of J-integral and the plastic SIF for specified test specimen geometries under mixed mode loading. Finally, the applicability of the plastic SIF approach to large-scale yielding analysis is also discussed.
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