Table 4.

Constitutive stiffness matrix $A_k$ for the SW model without perforation.

		A & B			B & D			R
		1	2	3	1	2	3	4	5
A & B	1	2184.4	388.92	0	0	0	0
	2	388.92	1756.9	0	0	0	0
	3	0	0	667.81	0	0	0
B & D	1	0	0	0	8628.2	1506.5	0
	2	0	0	0	1506.5	5469.3	0
	3	0	0	0	0	0	2300.2
R	4							105.08	0
	5							0	130.91