how to create a rectangular bucket tetrahedral format?

hi
I’ve tried to create a bucket in a rectangular form and trying to assign it as a tetrahedral mesh. while no matter how many times i tried, once the bucket layer is under impact, the layer will deform or wrap on the particle that impacts on it.
How can i fix it? can anyone teach me on this issue?
Thank you soooo much

one screenshot for a bucket that should be created is been attached, which I got from a third party.

It seems that you are talking of some problemtype doing impact simulation of particles, not of GiD itself.
This forum is for GiD questions, not for third part simulation GiD-problemtypes