Andreas Koutras
Ansys Employee


Here are some ideas.

For modeling the drilling process with FEM, you will need to use an ERODING contact, such as *CONTACT_ERODING_SINGLE_SURFACE and also use an appropriate material model (*MAT) that includes failure. For validating your approach, you can start with *MAT_024 in which material failure and subsequent element erosion is controlled by the effective strain at failure FAIL. More complex failure criteria can be also specified with *MAT_ADD_EROSION, *MAT_ADD_DAMAGE DIEM or GISSMO, or *MAT_ADD_GENERALIZED_DAMAGE.  Please look at the corresponding sections in the LS-DYNA manuals.

I hope this helps.