nour202's blog

Hi everyone,

what is the exponential curve used in ABAQUS to model the softening (damage evolution) for cohesive interaction? Reading the documentation, I find the equation for D (damage variable) in linear and exponential cases. But the exponetial curve is not given there (maybe it is not given explicitly).

Thanks,

Amir

Hello everyone,

In mixed-mode CZM in Abaqus, it seems that the fracture load in not sensitive to mode II fracture energy as the cohesive elements undergo mostly opening deformation. However, when I model elastic properties for the material, it undergoes both opening and shear displacements. It means CZM elments don't model the deformation properly. Even change in relative stiffness couldn't solve the issue. Has anybody faced this problem? If CZM elements cannot represent the deformation well, what have people done in the literature to find the failure load for mixed-mode loading?

Hello everyone,

I am getting a strange bug regarding CZM in ABAQUS. I have discrete joints between two copper bars in a DCB sample. I use the interaction module to model the contact in interface between the joint and copper. The contact works pretty well in some of the joints while no contact forms in some other ones especially the leading joint! It means that seperation happens immidiately after job submission. I would really appreciate if somebody can help me with this.

Thanks,

Amir