Stress Analysis of Three-Dimensional Media Containing Localized Zone by FEM-SGBEM Coupling

Table 2

Normalized mode-I stress intensity factor for isolated penny-shaped crack subjected to uniform normal traction.

Mesh	Isotropic material,𝐾1/𝐾1,exact		Transversely isotropic material, 𝐾1/𝐾1,exact
			Zinc		Graphite-reinforced composite
	𝜃^∘=0	𝜃^∘=90	𝜃^∘=0	𝜃^∘=90	𝜃^∘=0	𝜃^∘=90
1	0.9919	0.9920	0.9890	0.9890	0.9841	0.9841
2	1.0008	1.0008	1.0001	1.0001	1.0053	1.0053
3	1.0002	1.0002	1.0004	1.0004	1.0006	1.0001