Respected Sir,

I understand that you're facing convergence issues and early erosion during your impact simulation. Here are a few things you can check to help fix the problem:

Mesh Quality:You might want to refine the mesh, especially in the area where the impact happens. A coarse mesh can lead to inaccurate results and might be causing the convergence issues, so making the mesh finer could help.

Material Model:It’s important to use the right material model for the ceramic, especially one that captures its brittle nature. If the material model isn’t suited for how ceramics fracture, that could lead to incorrect erosion and cause the solution to diverge.

Boundary Conditions:Double-check the boundary conditions for both the ceramic and the projectile. Sometimes, incorrect boundaries can create non-physical behavior that destabilizes the solution.

Time Step and Solver Settings:Try reducing the time step a bit. If the step is too large, it can cause instability, but if it’s too small, it can slow things down or cause other problems. You might also want to tweak the solver settings to make it more stable.

Erosion Threshold:The 6% erosion might be a bit aggressive, leading to too much material loss too soon. Consider adjusting the erosion threshold or making the erosion model more gradual to avoid this.

Dimensions of the Impactor and Target:While you don’t necessarily need to change the dimensions, just make sure that the sizes of the impactor and target are realistic for your setup. If the impactor is too large or small compared to the ceramic, it could affect the results.

I hope these tips help you sort things out. Don’t hesitate to try out a few combinations of these adjustments to see what works best for your model.

Best of luck with your simulation!