Applicability of statistical damage simulation method of deformation process for rock deformation process considering strain rate variation
According to the characteristics of static and dynamic deformation and failure process and me-chanical properties of rock affected by the change of strain rate,by considering the effect of strain rate on rock strength,and connecting with the existing static rock strength criterion,the rock strength criterion functional is established,which can reflect the rock strength property under static and dynamic load and consider the change of strain rate.Then,based on the strength criterion functional established in this pa-per,combined with M-C strength criterion and D-P strength criterion,two different reasonable measures of rock microelement strength are determined.Then the statistical damage theory is introduced to consider the effect of damage threshold,and the static and dynamic statistical damage constitutive model of rock is es-tablished,the simulation method of rock deformation process considering the change of strain rate is estab-lished.Finally,it is concluded that the model can simulate not only the process of rock deformation under static load but also the process of rock deformation under dynamic load.It is suitable to simulate the de-formation and failure process of rock under different strain rates,and is in good agreement with the test curve.
rock mechanicsstatistical damagestrength criterion functionalstrain rateconstitutive model
万方数据
维普
