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Re: [Question #295745]: Do bending or twisting moment contribute to cohesive bond breakage ?

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Bruno Chareyre <question295745@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 29 Jun 2016 09:42:34 -0000
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Question #295745 on Yade changed:
https://answers.launchpad.net/yade/+question/295745

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi,

The contact moments can have upper bounds (strength) but for the moment the upper bound can only take the form Mmax=a*Fn where "a" is user defined coefficient. Also rotational plasticity will not interfere (will not "break") in the calculation normal/shear terms, as you found out.
It is not very difficult to generalize the current code if someone has a precise idea in mind.

>when the contact is in tension, i.e. Fn < 0 , does the equation above
actually reduce the value of maxFs ?

Yes indeed, if cohesion and friction are combined this is what happens.

Bruno

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