softening

In the attached paper, we have shown that concomitant bending and stretching, whatever their value, concur to make bending stiffness decrease; moreover, concomitant bending and stretching make the stretching stiffness (or the Young modulus) increase until the applied forces reach a threshold value, then they make it decrease. Said differently, graphene is softer to bend when stretched and bent and harder to stretch when bent and moderately stretched.

hello dear friends,

I am trying to conduct a pushover analysis on a 2D dam model by abaqus.the material is concrete and is modeled by damage plasticity. the problem is because of the softening issue ,while I apply force, the solution would not converge with a low magnitude of load and it remains elastic so I can not obtain a complete pushover curve. I have very little time to get the results so I appreciate anyone who would help.

Thanks