Enriched Element-Free Galerkin Method for Fracture Analysis of Functionally Graded Piezoelectric Materials

Table 2

The modified -integral under different number of nodes (N/m).

	Analytical solution	EFGM			EEFGM
		21 × 41	41 × 81	81 × 161	21 × 41	41 × 81	81 × 161
−1	−0.1431	−0.1312	−0.1385	−0.1402	−0.1386	−0.1401	−0.1410
−0.5	−0.3890	−0.3768	−0.3815	−0.3832	−0.3820	−0.3835	−0.3860
0	−1.0574	−1.0432	−1.0502	−1.0524	−1.0502	−1.0519	−1.0538
0.5	−2.8743	−2.8587	−2.8594	−2.8637	−2.8591	−2.8613	−2.8720
1	−7.8132	−7.8006	−7.8058	−7.8081	−7.8023	−7.8088	−7.8114