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[Question #284341]: Interaction of two different materials goes crazy

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From: behzad <question284341@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 01 Feb 2016 22:21:58 -0000
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New question #284341 on Yade:
https://answers.launchpad.net/yade/+question/284341

Hey guys,

I have interactions of two different materials in my model.
The first material is CohFrictMat. and the second one is CohBurgersMat which has viscoelastic properties and is a subclass of CohFrictMat.

The contacts of these two materials are handled by Ip2_CohFrictMat_CohBurgersMat_CohBurgersPhys. 


But, the problem is whenever we have this interaction in the model, the bodies rotational velocities go unstable and I need to reduce the DOFs by blocking the rotational DOFs. 

Is there any other way to treat this problem without blocking the rotational DOFs or using small time-steps? 

Can I do something on the contact model?

Thanks.


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