[Akhmad Faizin]

I'm working now in a metal forming research of wall thickness reduction of cup. There are punch, die, and cup. For meshing I'm using quadrilateral dominant methods and hex dominant methods. I'd like to find stress intensity in product (cup). I'm using explicit dynamics of ANSYS.
The problem is warning messages like below:
Some of the elements on the problematic bodies can't meet the specified target metrics. Please check the elements and try changing the mesh size settings to achieve the needed mesh quality.
I've change mesh size, but the messages come again and again.
Please h, how to overcome this issue?
thank's