The extrapolation of σ(ε) decided by tensile tests to large-strain behavior predicts erroneously ductility. Εp is the equal plastic strain of the fabric surrounding the void, V0 the preliminary and V the present void quantity. The coefficient α may take somewhat complicated expressions in the Direct CNC completely different models. Nevertheless, the cavities grow exponentially with the plastic strain when stress triaxiality T is larger than 1/3. The basic function of the stress triaxiality parameter will be discussed hereafter.
The extrapolation of σ(ε) decided by tensile tests to large-strain behavior predicts erroneously ductility. Εp is the equal plastic strain of the fabric surrounding the void, V0 the preliminary and V the present void quantity. The coefficient α may take somewhat complicated expressions in the Direct CNC completely different models. Nevertheless, the cavities grow exponentially with the plastic strain when stress triaxiality T is larger than 1/3. The basic function of the stress triaxiality parameter will be discussed hereafter.
RispondiElimina