the Study of Coarse Materials' Elastic-plastic Constitutive Relation Model

Through regressing the strength curves of coarse materials in test,establishing a strength criterion (τ=Aσ^b), based on this yield criterion and elastic-plastic theory,establishing a elastic plastic constitutive relation model of coarse material,which is continuative,no odd and has less parameter,and giving the elastic-plastic matrix D ^ep.The reasonableness and feasibility of this model are proven by practice.