TY - JOUR A2 - Lefik, Marek AU - Yuan, YanHui AU - Xiao, Ming PY - 2015 DA - 2015/08/20 TI - A Multiparameter Damage Constitutive Model for Rock Based on Separation of Tension and Shear SP - 821093 VL - 2015 AB - By analysis of the microscopic damage mechanism of rock, a multiparameter elastoplastic damage constitutive model which considers damage mechanism of tension and shear is established. A revised general form of elastoplastic damage model containing damage internal variable of tensor form is derived by considering the hypothesis that damage strain is induced by the degeneration of elastic modulus. With decomposition of plastic strain introduced, the forms of tension damage variable and shear damage variable are derived, based on which effects of tension and shear damage on material’s stiffness and strength are considered simultaneously. Through the utilizing of Zienkiewicz-Pande criterion with tension limit, the specific form of the multiparameter damage model is derived. Numerical experiments show that the established model can simulate damage behavior of rock effectively. SN - 1024-123X UR - https://doi.org/10.1155/2015/821093 DO - 10.1155/2015/821093 JF - Mathematical Problems in Engineering PB - Hindawi Publishing Corporation KW - ER -