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

Table 1

The modified -integral under different Gauss integral (N/m).

	Analytical solution	EFGM			EEFGM
		2 × 2	4 × 4	8 × 8	2 × 2	4 × 4	8 × 8
−1	−0.1431	−0.1387	−0.1402	−0.1408	−0.1401	−0.1409	−0.1416
−0.5	−0.3890	−0.3804	−0.3829	−0.3844	−0.3825	−0.3847	−0.3871
0	−1.0574	−1.0485	−1.0520	−1.0530	−1.0513	−1.0531	−1.0554
0.5	−2.8743	−2.8634	−2.8670	−2.8682	−2.8664	−2.8689	−2.8722
1	−7.8132	−7.8010	−7.8066	−7.8085	−7.8054	−7.8091	−7.8105