Abaqus Dynamic Implicit Calculations slow with tetraeder elements?

[Vegas125]

Hello,

meshing complicated geometries is a lot easier with tetraeder elements, than it is with hexaeder elements. Using quadratic tetraeder elements seems to yield acceptable results, when one compares results of C3D20R hexaeder- and C3D10R-elements. But when I use C3D10R-elements, or a combination of C3D10R-elements and C3D8R-hexaeder-elements, my dynamic implicit time simulations only converge at much smaller timesteps, thereby increasing calculation time a lot.

Is there a way to improve the speed of dynamic implicit calculations with tetraeder models, or combined tetraeder&hexaeder models?

 

[Vegas125]

Ah, I think I was mistaken. By changing the boundary conditions of this model, I was able to improve the maximum stepsize. Mea culpa. I tend to run into convergence problems more often when I use tetraeder elements.