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3D XFEM convergence chaos

Hello everybody

                     could anyone please tell me how to improve the convergence when using XFEM in Abaqus 6.10. I have tried small min increment 2.5e-16 and a total no of increments 1e9. Also, I have changed the control parameters to discontinuous analysis Io=8, IR=10, and IA=20 but actually I was not able to persuade XFEM to finalise the job.

 Please help as all my life is waiting at that point.

 

Adel Abdel-Wahab

PhD candidate

Loughborough University

UK 

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