Hi,

Hi,

I am new to Abaqus and I am trying to use it to model some industrial shells. According to some preliminar studies, the material has a mohr-coulomb plastic behaviour. Thus, I wanted to use shell elements, with a mohr-coulomb plastic material, but it seems that it is not possible in Abaqus.

According to the theoretical manual and the user manual (18.3.3-6):

"The Mohr-Coulomb plasticity model can be used with any stress/displacement elements in Abaqus/Standard other than one-dimensional elements (beam and truss elements) or elements for which the assumed stress state is plane stress (plane stress, shell, and membrane elements)."

The fracture mechanics community may be interested in a new evaluation of a J-Integral for a fundamental geometry:  an elliptical hole in a perfectly plastic material under the Tresca yield condition for plane stress loading conditions. The analysis is exact and involves only elementary functions.  This makes the problem suitable as a classroom example or as a homework problem for a graduate level course in fracture mechanics.  See J. Elasticity (2008) 92:217-226. http://www.springerlink.com/content/102932/