New Nonlinear Cumulative Fatigue Damage Model Based on Ecological Quality Dissipation of Materials

Table 1

Experimentally obtained and corresponding theoretical remaining life values predicted by the Miner, Kwofie, and proposed new model for the 30NiCrMoV12 alloy steel under two-level cyclic loading.

Load sequence	Test data			Miner model	Kwofie model	New model
(MPa)	(cycle)		(cycle)	(cycle)	(cycle)	(cycle)
485–400 (H–L)	13749	0.25	51304	109313	100352	39438
	27499	0.50	45765	72875	66901	23908
	41249	0.75	16032	36438	33451	11729
465–420 (H–L)	17013	0.25	66845	85407	81630	51946
	34072	0.50	30405	56938	54427	31898
	51040	0.75	38262	28469	27210	15629
450–420 (H–L)	20082	0.25	79372	85407	82847	61988
	40165	0.50	24711	56938	55231	38613
	60248	0.75	15943	28469	27616	18960
400–485 (L–H)	36437	0.25	53348	41250	44932	54918
	72875	0.50	45373	27500	29954	53202
	109312	0.75	46693	13750	14978	39044
420–465 (L–H)	36440	0.25	58594	51040	54533	65445
	72870	0.50	56416	34027	36356	54293
	109310	0.75	48998	17013	18177	30599
420–450 (L–H)	28469	0.25	70530	60248	62109	73665
	56938	0.50	39362	40165	41406	56413
	85407	0.75	10523	20083	20703	30010