[petsc-users] Solvers for phase field fracture

Sanjay Govindjee s_g at berkeley.edu
Thu Jan 4 01:35:38 CST 2018

Are you sure your problem is stable?  Also have you tried adding mass?

On 1/3/18 10:12 PM, Avtar Singh wrote:
> Hello Petsc Users,
> I am solving a fortran framework to simulate phase-field fracture 
> problem. Upto the failure point the code is working fine. But as the 
> crack-phase starts to propagate, there is abrupt changes in the 
> Stiffness Matrix, so determinant becomes nearly equal to zero.  Hence, 
> the code crashes.
> I tried with mumps package with pc lu. Also tried, superlu, gmres and 
> fgmres with jacobi, bjacobi, lu. But the problem still persist.
> Can anyone suggest, Which solver and preconditioner should i use?
> Thank you
> -- 
> Avtar Singh
> Research Scholar
> Multiscale Mechanics and Multiphysics Lab
> IIT Roorkee, Roorkee

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