Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5013809 | Engineering Fracture Mechanics | 2017 | 36 Pages |
Abstract
In this study, we investigated long fatigue crack growth perpendicular to a soft-hard material interface comprising the same Young's moduli but different yield strengths. We determined the degree of fatigue crack growth retardation attributable to the interface under the constant stress intensity factor range (ÎK) using the plasticity-induced crack closure analysis with the Dugdale model. We subsequently determined the threshold stress intensity factor range (ÎKth) under a constant stress amplitude (Ïa). Under a constant ÎK, the retardation degree was primary dependent on the two materials' yield strength ratio. Under a constant Ïa, ÎKth was dependent on both the yield strength ratio and the distance between initial crack tip and interface.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Bochuan Li, Motomichi Koyama, Shigeru Hamada, Hiroshi Noguchi,