Improved Genetic Algorithm with Two-Level Approximation Method for Laminate Stacking Sequence Optimization by Considering Engineering Requirements

Table 6

Summary of practical designs.

Case	Optimum designs	Plies	Weight, kg	Maximum displacement, mm	Iteration number
1	±45/(90/0/±45)2/0/(±45)2/0/±45/90/0/(±45)2/90/(±45)2/90/±45/90/0/±45/02/±45s	80	0.5031	3.01	9
	90/02/90/±45/0/90/±45/0/(±45)2/90/02/±45/(90/±45)2/(0/±45)2/902/(±45/90)2s	80	0.5031	3.04	10
	±45/90/0/90/±45/02/90/02/(±45)2/90/(0/±45)2/902/0/(±45)3/90/±45/902/0/90/0s	80	0.5031	3.05	14
2	(±45)2/0/90/±45/0/(±45)2/90/(±45/0)2/(90/±45)2/(±45)3/0/90/0/±45/0/90/0s	80	0.5031	3.02	9
	(±45)2/90/±45/0/(90/±45)2/0/(±45)2/90/(±45)2/0/±45/02/(±45)2/0/(±45/90)2s	80	0.5031	3.03	14
	(±45)2/0/±45/90/0/90/(±45)2/0/(±45)2/0/90/0/(±45)5/0/(±45)2/90/±45s	80	0.5031	3.05	9
3	0/±45/90/±45/0/90/±45/90/0/90/(±45)2/0/(±45)3/0/±45/0/90/±45/902/±45/90/02/±45s	80	0.5031	2.99	8
	±45/02/(90/±45)2/90/0/±45/0/±45/90/0/±45/90/±45/0/±45/902/0/(90/0)2/902/0/90/02s	80	0.5031	3.00	14
	±45/90/0/(±45)3/90/0/902/0/±45/0/90/±45/0/90/(02/90)2/0/±45/(90/0)3/02s	80	0.5031	3.02	13