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normal stress and mohr-coulomb failure

Posted Jun 11, 2015, 11:20 p.m. EDT Results & Visualization, Structural Mechanics Version 5.1 0 Replies

Erwan Chattel
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Hello,

I would like to calculate friction failure along a surface of my axisymmetric model using Mohr-Coulomb (which parts fail and don't). The idea would be to plot a 1D plot of the surface where the stress reaches failure.

I need to use the normal stress to that surface to calculate tau (= cohesion + normal stress * tan theta), and I was wondering if COMSOL was providing the normal stress to each surface in other.

I also found that the normal stress is equal to
normal stress = 0.5*(sigma1 + sigma3) - 0.5*(sigma1 - sigma3)*cos(2theta)
where sigma1 = solid.sp3 and sigma3 = solid.sp1, does COMSOL provides theta the angle between the plane and sigma1 (=solid.sp3)?

Thank you for your help
0 Replies Last Post Jun 11, 2015, 11:20 p.m. EDT
COMSOL Moderator

Hello Erwan Chattel

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