Fatigue Design Evaluation of Railway Bogie with Full-Scale Fatigue Test

Table 3

Measured maximum stress for static test.

Load case	Load conditions	Maximum stress (MPa)	Yielding strength (MPa)	Safety factor	Material	Gauge no.
1	Vertical force	−127	325	2.56	SM490A	02
		113	325	2.87	SM490A	37
2	Transverse force	−114	325	2.85	SM490A	02
		104	325	3.13	SM490A	38
3	Longitudinal force	95	315	3.32	STKM18A	32
		84	325	3.86	SM490A	36
4	Lozenging forces	−87	325	3.74	SM490A	02
5	Twist load	−93	325	3.49	SM490A	42
6	Traction motor	−106	325	3.01	SM490A	10
	Inertia load
7	Traction motor load	−93	325	3.49	SM490A	01
8	Emergency braking load	−107	325	3.04	SM490A	02
9	Active steering force	140	315	2.25	STKM18A	32
	Vertical + transverse force	123	325	2.64	SM490A	34
	Vertical + transverse + twist force	135	325	2.41	SM490A	34

Combined load at normal service load.