Open Access

Table A1

SR4 material parameters for sand lithology.

Property Value Units
Young modulus (E) 75000 Pa
Poisson ratio (υ) 0.2  
Grain density (ρs) 2710 kg/m3
Reference porosity (φ) 0.35  
Reference tensile intercept (pt) 20 Pa
Reference pre-consolidation pressure (pc) −3000 Pa
Yield surface shape parameter (β) 65 °
Yield surface shape exponent (n) 0.95  
Flow potential shape parameter (ψ) 68.7 °
Flow potential surface shape exponent (m) 0.77  
Deviatoric plane shape parameter 1 (β0) 0.6  
Deviatoric plane shape parameter 2 (β1) 2 × 10−4  
Deviatoric plane shape exponent 0.25  
Hardening properties (see hardening curve in Fig. A4)  

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