Abstract
It is well known that the soil exhibits nonlinear behavior when stressed under different condition. Therefore, it is a topic of interest for many researchers to study the failure mechanism of the soil considering its plastic nature. This led to the development of different constitutive modeling techniques. Analysis of geotechnical problems using finite element method (FEM) combined with constitutive laws ensures precise prediction of the behavior of complex problems. Shear strength parameters of soil also depend on amount of strain applied to the soil mass. This paper presents the effects of variation of plastic strain on shear strength parameters of soil. The nonlinear behavior of soil with two types of laboratory tests attributing to variation in plastic strain is simulated numerically using a FORTRAN subroutine linked with ABAQUS. The results are compared which shows how important it is to consider the variation of plastic strain when the numerical analysis is done.
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