Propagation of physically short cracks in a bainitic high strength bearing steel due to fatigue load

A modification of UniGrow 2‐parameter driving force model for short fatigue crack growth

“…In fact, most structures and components contain various forms of cracks or defects at smaller length scales because of material imperfection, fabrication, and assembly conditions. 15,[19][20][21][22][23][24] Those detailed investigations were aimed to shed light into the characterization of crack behaviour controlling factors associated with material and environmental, loading conditions, etc. However, the design of most structures is still based on crack initiation that do not account for such unavoidable small defects.…”

“…Although long cracks may be detected and monitored, short cracks are practically undetectable by current NDI techniques. 15,[19][20][21][22][23][24] Recently, many modelling efforts have been also made to evaluate fatigue crack behaviours of materials in the SC regime. As a result, components may be overdesigned using a high factor of safety, or their service life expectancy may become unreliable in the presence of such small defects.…”

“…However, those works focused on rather experimental studies to have a better understanding of short crack growth behaviour. 15,[19][20][21][22][23][24] Recently, many modelling efforts have been also made to evaluate fatigue crack behaviours of materials in the SC regime. Newman [25][26][27][28] developed a crack closure model to calculate the short crack growth rate and fatigue lives for 2 aluminium alloys.…”

“…Those detailed investigations were aimed to shed light into the characterization of crack behaviour controlling factors associated with material and environmental, loading conditions, etc. However, those works focused on rather experimental studies to have a better understanding of short crack growth behaviour …”

The fatigue behavior and fatigue reliability analysis of vibroseis baseplates based on fracture mechanics

“…In this new model, they measured the initial and final crack lengths, crack propagation angle, fracture parameters, elastic parameters, and external load as random variables. In 2016, Alfredsson et al 7 performed research on physically short cracks propagating in a bainitic high-strength bearing steel while under fatigue load. In 2014, Shi 8 adopted the fracture mechanics theory and established the residual fatigue life assessment model of a bridge crane metal structure under a constant amplitude loading, considering the effect of stress ratio.…”