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Re: [Question #688400]: Energy of the body is very high, defying gravity and normal stress - cpm material

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jan Stránský <question688400@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 03 Feb 2020 10:47:55 -0000
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Question #688400 on Yade changed:
https://answers.launchpad.net/yade/+question/688400

    Status: Open => Needs information

Jan Stránský requested more information:
> It's 1.20.0.
> I have only changed three lines in the source code.

Comparing the provided file ConcretePM.cpp and the one from 1.20.0,
there is much more than three lines changes..

> Were you able to figure out any discrepancy in my code that led to the overall behaviour?
> epsCrackOnset = 5e-1,
> epsCrackOnset = 5e-2

Where these values come from?
this epsCrackOnset would lead to non-realistically high strength, very roughly f=E*e=32e9*5e-1=16 GPa / 1,6 GPa. Then the material behaves as elastic and you will not get any damage..
The elastic sample cannot do anything else (damage is not possible and stiffness is too high to somehow deform dramatically) than to ''FLY'' up..

Jan

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