Table 4 Calibrated micro-parameters of grains and grain boundaries in the grain-based model of marble.

From: Experimental and numerical investigation on mechanical properties and fracture mechanisms of deep marble under triaxial compression

Micro-parameters

Value

Micro-properties of the minerals

 

Disk-size ratio, Rmax/Rmin

1.66

Disk-disk contact modulus/GPa

188

Contact normal to shear stiffness ratio

2.0

Disk friction coefficient

0.2

Disk density/kg/m3

2650

Parallel bond radius multiplier

1.0

Parallel bond modulus/GPa

188

Parallel bond normal to shear stiffness ratio

2.0

Parallel bond tensile strength/MPa

225

Parallel bond cohesion/MPa

300

Parallel bond friction angle/°

68

Micro-properties of the mineral boundaries (smooth-joint contacts)

 

Smooth-joint contact normal stiffness factor

0.6

Smooth-joint shear normal stiffness factor

0.8

Smooth-joint bond tensile strength/MPa

15

Smooth-joint bond cohesion/MPa

58

Smooth-joint bond friction angle/°

61

Smooth-joint bond friction coefficient

0.3

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