A GENERALIZED FAILURE CRITERION FOR 3-DIMENSIONAL BEHAVIOR OF ISOTROPIC MATERIALS

A failure criterion for isotropic materials based on three invariants of the stress tensor and six parameters is proposed. Basic tests for t he determination of the parameters are formulated. A comparison with s pecial criteria from literature is made and recommendations for using the special criteria are given. It is shown that the results of calcul ation using the proposed criterion are in good agreement with experime ntal data for grey cast iron, magnesium alloy and epoxy compound in th e case of high hydrostatic pressure. The experimental data are taken f rom literature about failure tests in the case of moderate and high hy drostatic pressure. Thin-walled tubular specimen loaded by axial force , inside pressure and a torsional momentum in different combinations a re used. (C) 1996 Elsevier Science Ltd.