Bending Angle Prediction Model Based on BPNN-Spline in Air Bending Springback Process

Table 1

Parameters of research materials.

Material	E (GPa)	K (MPa)	n	(MPa)	M
DC06	207	530	0.24	126	0.61
SUS304	207	1455	0.5	239	1.15
DP600	207	1099	0.179	382	1.85
B340LA	207	678	0.16	400	1.93
6111-T4	69	549	0.235	143	2.07