how to solve warning code 5 in plaxis "some stress points violated either the fairlure criterion or tension cut-off criterion" ?

Hi Randy,

As per Appendix I of PLAXIS 2D – Reference manual, Error Code 5 means that one or more Tension of Mohr-Coulomb points was found in the model.
The reason for getting this error might be related to the K0 procedure and the value provided for K0. Using very low or very high K0-values in the K0 procedure may lead to stresses that violate the Mohr-Coulomb failure condition. In this case, PLAXIS 2D automatically reduces the lateral stresses such that the failure condition is obeyed. Hence, these stress points are in a plastic state and indicated as plastic points. However, although the corrected stress state obeys the failure condition, it may result in a stress field which is not in equilibrium.

It is generally preferable to generate an initial stress field that does not contain Mohr-Coulomb plastic points. So, please inspect the Output for the Initial phase (K0 procedure) and check the K0 values for the materials where the plastic points occur.

if i have checked the Output for Initial phase (procedure K0) and checked the value of K0 for the material where plastic point occurs. what should i do next? Previously I had changed the k0 value of the procedure with some of the recommended formulas, but when I running the modeling, in 'embankment 2' (can be seen in the picture) an error occurred as follows even though I have increased the max step to 10.000 value for calculations in the modeling.

if i have checked the Output for Initial phase (procedure K0) and checked the value of K0 for the material where plastic point occurs. what should i do next? Previously I had changed the k0 value of the procedure with some of the recommended formulas, but when I running the modeling, in 'embankment 2' (can be seen in the picture) an error occurred as follows even though I have increased the max step to 10.000 value for calculations in the modeling.