A Refined Higher-Order Hybrid Stress Quadrilateral Element for Free Vibration and Buckling Analyses of Reissner-Mindlin Plates

Table 1

Assumed stress function.

1	1	0	0	0	0
2	0	1	0	0	0
3	0	0	1	0	0
4		0	0	1	0
5		0	0	0	0
6	0		0	0	0
7	0		0	0	1
8	0	0		0	1
9	0	0		1	0
10		0
11		0	0		0
12		0	0	0	0
13	0		0	0	0
14	0		0	0
15	0
16	0	0		0
17	0	0			0
18		0
19		0
20		0	0		0
21		0	0	0	0
22	0		0	0	0
23	0		0	0
24	0
25	0
26	0	0		0
27	0	0			0
28			0
29		0
30		0	0		0
31		0	0	0	0
32	0		0	0	0
33	0		0	0
34	0
35			0
36	0	0		0
37	0
38		0
39	0	0			0