Yes, this due to the fact that in general this approach can not be used with this type of material with a discontinuity (the fiber) inside. Moreover, Abaqus is not the right option to do this type of analysis.

I personally think that you should search for another option.

Best Wishes. All the best for your problem.

Dear De Binachi,

LEFM-based methods like XEFM or contour integral are in general developed for a single pre existing crack and cannot be used for complex crack propagation systems.

For complex systems of multiple crack propagations or coalescence, cohesive zone models (CZM) can be one of the best substitute for traditional LFEM-based approaches. The major advantagous of CZM is the ability for multicrack initiation and propagation without the need to create pre-cracks.

In this method, a combination of strength theory and energy-based approaches is used through a traction–separation law.

There are various traction-separation laws with different strength failure criteria like maximum nominal stress ( Maxs ), quadratic nominal stress (Quads), etc. for damage initiation and different fracture mechanic-based constructive laws such as BK, power law, etc. for propagation phase.

Based on your study, you can find the most appropriate model.

Regards ,

Mohsen

Hi Federico De Bianchi,

Be sure that in Mesh->Mesh Controls: Element Shape is Quad (not Quad-dominated or Tri).