Learning Forum

[sunmix6]

Hello everyone,nI'm using the ICFD of LS-Dyna to simulate the forming of fibrous composite. However, there will always be errors after running for a period of time:nError 120003 (ICFD+3). Possible surface collapse.nI don't know what caused the error. Re-Meshing has been turned on and there's no duplicate nodes.nIf anyone knows why, can you help me? Thank you so much.nn

[tslavik]

This error usually happens when two fluid surfaces intersect and come into contact with each other. This will create an invalid fluid mesh i.e "a mesh surface collapse". The key here is to find in which region this is happening (there is a  file which dumps the surface mesh : icfd_tmp_sm.k which  often helps) and to define a contact with offset (See *CONTACT) between those two parts such that no penetrations are allowed.

[sunmix6]

Hello tslavik,

Thank you so much for your help. I have checked icfd_tmp_sm.k and confirmed the contact failure area. It occurs in self-contacting parts.

Do you mean that the "offset" refers to a contact type similar to TIED_NODES_TO_SURFACE_OFFSET? After consulting some relevant documents, I found that this type of "TIED" contact does not seem to apply to self-contact situations. Do you have any suggestions for self-contact penetration in ICFD? Thank you!

[Md Zunayed Habib]

I am experiencing the same issue. Did you get a solution?