Abaqus CEL is commonly used in order to study soil resistance during pile installation, spudcan punch through, CPT penetration, etc in cohesive soils (friction angle=0). The analysis is usually conducted for some scaled parameters of the soil such that the ratio of shear modulus (G) to shear strength (c) does not change. This allows using a lower value of G, hence lower dilatational wave speed and larger time increment (see e.g. ref below).
I was wondering if I can apply similar scaling to the parameters of a rock-like material whose friction angle (phi) is not zero. Without scaling, the time increment becomes very small since rocks have high wave speeds. I was thinking that I could keep constant the ratio of shear modulus to uniaxial compressive strength (G/UCS), where UCS=2c*cos(phi)/(1-sin(phi)). But I am concerned about the role of friction angle.
References:
Walker, James, and H-S. Yu. "Analysis of the cone penetration test in layered clay." Géotechnique 60.12 (2010): 939-948.
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