Robust Design of S-Shaped Box Beams Subjected to Compressive Load

Table 1

The values of objective functions and their associated design variables of the obtained design points.

Design	D	C	R	$\theta$	t	Variance-per-mean ratio of	E(J)	W
Point	(mm)	(mm)	(mm)	(deg)	(mm)	$P_{\max \hspace{0.17em}}$	(absorbed energy)	(Kg)
A1	150	40	435.11	33.33	3	32.854	4825.93	3.59
A2	150	50	150	60	2.7	35.207	5162.74	4.23
A3	150	60	150	60	2	45.724	4026.45	3.84
A4	150	70	150	60	2	58.996	4507.12	4.5
B1	200	40	571.63	20	3	32.991	5655.6	3.6
B2	200	60	200	60	2.2	41.546	4862.82	4.28
B3	200	70	200	60	2	53.606	4548.25	4.58
C1	250	40	1003.1	22.67	2.9	34.155	5636.96	3.51
C2	250	60	250	60	2.4	39.683	3270.22	4.73
C3	250	70	250	60	2	50.629	2682.26	4.66
D1	300	50	300	22.67	2.3	42.389	5555.49	3.64
D2	300	60	300	60	2.5	37.696	3688.8	5
D3	300	70	300	60	2	48.03	2787.27	4.73