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An accurate prediction of blow-out preventer (BOP) drill pipe shearing is of critical importance in the applications of offshore drilling equipment. To simulate the shear process, a ductile failure criterion is clearly needed. In this paper, we employ an extended Mohr-Coulomb (EMC) criterion, which makes validated predictions for shear fracture by including the stress triaxiality T and Lode parameter...
In this paper, we propose an extended ductile fracture criterion to study forming limit of DP 590 steel sheet. This criterion involves two independent parameters, stress triaxiality η and Lode parameter μ base on continuum damage mechanics, and assume that the damaged and undamaged configuration obey same material plastic evolution law. Thereafter, the criterion is extended to sheet metal forming...
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