Modeling elastic-plastic buckling of sandwich axisymmetric shells: on the limits of

Advanced Modeling and Simulation in Engineering Sciences

Table 13 The calculated relative internal buckling pressure for the 30° cone

Overall	β	COQMULT	r _cone-pint	QUA8	Ratio
thickness		$\frac{P_{cr}}{P_{COQMULT}^{E = 200000}}$		$\frac{P_{cr}}{P_{QUA 8}^{E = 200000}}$	QUA8/
(mm)					COQMULT
3	0.0001	0.82	0.801	0.26	0.31
3	0.001	0.82	0.801	0.54	0.67
3	0.01	0.82	0.803	0.79	0.96
3	0.1	0.83	0.823	0.83	1.00
3	1.0	1.	1.0	1.	1.00
11	0.0001	0.313	0.287	0.022	0.07
11	0.001	0.314	0.287	0.097	0.31
11	0.01	0.321	0.295	0.287	0.89
11	0.1	0.389	0.365	0.385	0.99
11	1.0	1.	1.0	1.	1.00
51	0.0001	0.068	0.067	0.0017	0.026
51	0.001	0.069	0.068	0.0072	0.10
51	0.01	0.078	0.077	0.044	0.57
51	0.1	0.160	0.0165	0.162	1.00
51	1.0	1.	1.0	1.	1.01