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

Advanced Modeling and Simulation in Engineering Sciences

Table 16 The calculated elastic-plastic buckling load under external pressure for the 60° cone

Overall	β	COQMULT		QUA8		Plasticity ratio
thickness		$P_{crit}^{plast}$	$\frac{P_{crit}^{plast}}{P_{E}}$	$P_{crit}^{plast}$	$\frac{P_{crit}^{plast}}{P_{E}}$	QUA8/
(mm)		(MPa)		(MPa)		COQMULT
3	0.0001	0.00605	1.0	0.00496	1.	0.82
3	0.01	0.00607	1.0	0.00605	1.	1.
3	1.	0.00859	1.27	0.00681	1.	0.79
11	0.0001	0.0627	1.0	0.028	0.9	0.44
11	0.01	0.0642	1.0	0.063	1.	0.98
11	1.	0.201	1.18	0.158	0.9	0.79
51	0.0001	0.175	0.23	0.032	0.18	0.18
51	0.01	0.219	0.25	0.196	0.24	0.89
51	1.	4.15	0.53	3.55	0.44	0.86