A theory of warm prestressing: experimental validation and the implications for elastic plastic failure criteria

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A theoretical explanation of warm prestressing (WPS) is proposed based on the J-integral. This is defined so that only elastic strains and distortions are included in the integrand compared with the definition of J common in finite element computation where total strains and distortions are used. The physical meaning of J as used here is that it represents the force on singularities (e.g., dislocations) enclosed by the contour of integration. Therefore, it is path dependent if the contour cuts through the plastic zone.