Optimal specifications for degrading characteristics

Figures & data

Fig. 1 Effect of shifting manufacturing target: (a) without shift; and (b) with shift.

Fig. 2 The estimation of the failure time.

Table 1 Material characteristics and optimal solutions

				With shift			Without shift
Material	(%)	σε(%)	C($)	T*	r*	AL*	T	r*	AL*
1	0.15	1.20	36	−0.931	12.42	11.535	0	7.82	14.079
2	0.06	0.45	70	−0.857	28.57	4.685	0	18.00	6.842
3	0.05	0.15	126	−0.981	39.25	4.926	0	24.72	7.753

Table 2 Effect of σ and σ_β (material 2)

σ	σβ	T*	r*	AL*
0.00	0.00	−0.857	28.57	4.685
0.00	0.01	−0.828	27.58	4.817
0.01	0.00	−0.856	28.54	4.693
0.01	0.01	−0.827	27.56	4.824

Table 3 Effect of C/K (material 2)

C/K	T*	r*	AL*
14	−0.857	28.57	4.685
100	−1.651	55.03	14.638
1000	−3.557	118.56	64.265
10000	−3.800	—	356.055