Table 4 Elastic flexibility matrix components.

From: A damage constitutive model of layered slate under the action of triaxial compression and water environment erosion

Anisotropy angle β

S13

S23

S33

− 8.5237e−06

− 8.5237e−06

3.40948e−05

30°

− 7.86968e−06

− 1.4733e−05

3.84949e−05

45°

− 7.21566e−06

− 1.68027e−05

3.87582e−05

60°

− 6.56164e−06

− 1.4733e−05

3.48848e−05

90°

− 5.90763e−06

− 8.5237e−06

2.68745e−05