July 28, 2022 at 6:29 pmjavat33489Subscriber
Hello dear professionals.
I have another problem, sorry. I need help.
I am modeling a test model (downloaded from the forum) before moving on to a complex one. The task of drilling a metal plate. The problem is that I don't have shavings. There are no chips with any material, any fracture model. Most likely the problem is not in the material. Help find her. When drilling, the body behaves like a very elastic one:
To explain all the settings is very long, so I attached the K-file DOWNLOAD K-FILE.
I will be very grateful if you help, I can not find the reason for a very long time.
August 1, 2022 at 12:49 pmAniketAnsys Employee
August 2, 2022 at 5:35 pmjavat33489Subscriber
August 1, 2022 at 7:01 pmAndreas KoutrasAnsys 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.
August 2, 2022 at 5:45 pm
August 4, 2022 at 3:52 pm
August 10, 2022 at 5:14 pm
August 15, 2022 at 6:44 pmjavat33489Subscriber
Why is the material removed?
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