Table 4 Slate HJC model parameter values.

From: Calculation method of HJC constitutive model parameters of natural joint angle slate

Angle

ρ/(kg·m−3)

G/GPa

A

B

C

N

fc/MPa

T/MPa

EPSO

Εf,min

2754

10.92

0.3470

1.0093

0.0032

0.8562

142.16

18.31

1

0.01

30°

7.74

0.3288

0.7918

0.0020

0.7089

58.81

13.08

45°

8.97

0.4623

0.6313

0.0032

0.3447

38.82

10.98

60°

10.01

0.4570

0.4560

0.0021

0.5780

31.43

8.08

90°

16.46

0.2105

1.0479

0.0054

0.9416

136.14

1.22

Smax

PC/GPa

μc

Pl/GPa

μl

D1

D2

K1/GPa

K2/GPa

K3/GPa

Fs

20

0.0474

0.0038

2.02

0.053

0.034

1

39

− 223

550

− 0.001

0.0196

0.0021

0.026

0.0129

0.0013

0.022

0.0105

0.0007

0.024

0.0454

0.0015

0.057