1Frydman S ,Talesnick M. Simple shear of isotropic elasto- plasticsoil[J].International Journal for Numerical and Analyt icalMethods in Geomechanics ,1991,15(04):251-270.
2Cundall P A.A computer model for simulating progressive large scale movements in blocky system. In: Muller Led. Proceedings of the international Society of Rock Mechanics[J]. Rotterdam A.A. Balkema, 1971(01):8-12.