Damage-induced nonassociated inelastic flow in rock salt

摘要: Abstract The multimechanism deformation coupled fracture model recently developed by Chan et al. [1992], for describing time-dependent, pressure-sensitive inelastic flow and damage evolution in crystalline solids was evaluated against triaxial creep experiments on rock salt. Guided experimental observations, the kinetic equation law damage-induced were modified to account development of dillation transient regime. revised then utilized obtain response salt as a function confining pressure stress difference. Comparison between calculation experiment revealed that is nonassociated, dilational, contributes significantly macroscopic strain rate observed deformed at low pressures. volumetric due decrease with increasing pressures, all are suppressed sufficiently high