Failure induced pore pressure by simple procedure in LEM

From soft clay behavior, we also know that the lower the strain rate is, the more there will be creep strain. In terms of soil modeling, the rate dependency of failure shear stress can thus be explained by that a higher volumetric straining for lower strain rates needs to be compensated by a larger reduction of effective stress. For high strain rates, the creep tendency is much smaller, resulting in a smaller reduction of effective stresses, as a smaller tendency to volumetric hardening need to be compensated. This is illustrated in a principal sketch in Figure 1.