Learning Forum

[MTLCY]

Dear Engineers,
 
I am working on a rock cutting simulation. What I care about are contact force and mass of rock debris. When I using FEM model, the contact force is much less than experimental results due to the failed element deleting. Therefore, I tried FEM-SPH method. The contact force is in good agreement with experimental results when I using FEM-SPH without mat add erosion, but no rock debris produced. However, when I using FEM-SPH with mat add erosion, the contact force is still less than experimental results due to the rock particles fly out.
Here are some details about my model,

Rock: SPH , Mohr-Coulomb model
Disc cutter: FEM, rigid
Contact: *CONTACT_AUTOMATIC_NODES_TO_SURFACE
CONTROL CONTACT: enmass=1
Failure criterion: tension failure, set the value of MNPRES in *MAT_ADD_EROSION to minus tensile strength (got from static Brazilian splitting test).
 
Could you tell me how to get reasonable contact force when using MAT_ADD_EROSION in FEM-SPH model?

Thank you in advance.

[MTLCY]

Using FORM=1n