How to model particle deformation & internal damping via overlap in EDEM?
Hi, I have a question regarding Altair EDEM settings.
I'm trying to model a situation where particles deform upon collision, and I want to express that deformation through actual penetration (overlap) between particles.
In addition, I’d like the particles to have internal damping, so they absorb impact and return slowly, like viscoelastic PU beads.
To achieve this kind of behavior, could anyone advise:
- Which Base Model and Friction Model should be selected in the Physics tab?
- Are there any Additional Models that should be activated to support this behavior?
I'm using ~2–4 mm diameter viscoelastic (PU-like) particles. Any insight would be much appreciated!
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Altair EmployeeHi,
The closest is probably the EEPA model which allows you to model Plastic Deformation. We don't currently have any models that give viscoelastic behaviour although you could consider implementing something in the API, however that is a significant undertaking.
Hi Armstrong
This is a general figure of material behavior to help determine which contact model would be best for your case.
Once you determine a contact model, you can read more about its physics here: https://help.altair.com/edem/topics/creator_tree_physics/understanding_base_contact_models_r.htm
If you think the internal damping is not sufficient, or would like to change anything about the contact model, you can also write your own contact model via EDEM API: https://altair.com/resource/edem-application-programing-interface-api-and-introduction-to-edempy
Hope all this helps.
Thanks,
Jerrin Job