![]() ![]() This Webnote uses the simple example of a cylindrical bar subjected to a uniaxial load to describe the reasons for this.īoth elastoplastic and nonlinear elastic material models use stress-strain tables to define the nonlinear relationship between stress and strain in the material. The stress values reported at the Gauss points in material nonlinear brick elements can exceed the corresponding values on the stress-strain curve when geometric nonlinearity is included in the analysis, even for a fully converged increment. ![]() ST7-1.57.10.2 Brick Element Material and Geometric Nonlinearity In this Webnote we develop the equations used by Strand7 to calculate failure and render results using this yield criterion, based on the fundamental failure criterion. The behaviour of these materials is governed by material cohesion and the internal friction angle. The Mohr-Coulomb yield criterion is often used in the analysis of frictional materials such as soil and concrete. ST7-1.57.10.1 Mohr-Coulomb Yield Criterion ![]()
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