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Relation Between Drained Strength of MC failure Criteria and Von Mises Stress

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SKSA

Civil/Environmental
Feb 28, 2024
33
Hello there,
I am trying to model a slope. I have some initial von misses stress in ABAQUS. We know that the that Von misses yield strength is two times(2*Su) of undrained shear strength. So in my drained analysis, I need to fix the soil properties before failure so that the slope is stable in existing condition. I am using Mohr Coulomb Failure Criteria. Then I will initiate failure. So, How can I select the parameters (Cohesion and Angle of internal friction) based on my von misses stress? Like,.. I have high von misses stress at the toe like 250 kPa and in others part it varies between 150 kPa to 200 kPa. So, how can I select the parameters?

Thank you for reading this one. Please help me.
 
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It could be any combination of c' and phi'. You need to know ball park numbers from local knowledge.
 
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