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[Ziyu Wang <question700143@xxxxxxxxxxxxxxxxxxxxx>]

New question #700143 on Yade:
https://answers.launchpad.net/yade/+question/700143

Hello,

I simulated a deep granite sample with a peak stress of about 120MPa and a peak strain of about 0.015.
After a lot of debugging, I selected a set of the most appropriate parameters and obtained the uniaxial compression stress-strain curve consistent with the test.
However, when I use the same parameters for triaxial compression simulation, I find that the parameters are not applicable. The problems are as follows:
The triaxial compression simulation step is to apply 10MPa confining pressure to achieve equilibrium, and then apply a certain axial strain rate.The termination condition I set is that the axial strain reaches 0.03(I think is enough..).
However,I found that the stress is only about 20MPa and the stress-strain curve keeps a linear rise...

How should I adjust the parameters?I think the ideal result should be that the stress reaches more than 100MPa and the stress-strain curve decreases significantly when the strain reaches about 0.015.

Thanks for help!

My parameters:
O.materials.append(JCFpmMat(type=1,density=2640,young=20e9,poisson=0.1,tensileStrength=25e6,cohesion=50e6,frictionAngle=radians(60),label='sphere'))



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