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Converting Mohr Coulomb parameters in Drucker Prager parameters

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anna12

Geotechnical
Joined
May 5, 2005
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3
Location
DE
Hallo,
I have a 3D and a 2D model. I use Mohr Coulomb parameters for my material. I tried to convert them into Drucker Prager parameters.

For my 3D model I used the equations from the triaxial test:
Mohr Coulomb: ?=35° , ? = 11 => Drucker Prager: ?= 54.81°, ? = 22, K= 0.778

For my 2D model I used the equations from plaine strain response:
Mohr Coulomb: ?=35° , ? = 11 => Drucker Prager: ?= 43.81°, ? = 22, K= 1

My results do not correspond to each other.
Please Help me. I do not know what I am doing wrong.

 
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