This paper presents an experimental study of the fretting crack nucleation threshold, expressed in terms of loading conditions, with a cylinder/plane contact. The studied material is a damage tolerant aluminium alloy widely used in the aerospace application. Since in industrial problems, the surface quality is often variable, the impact of a unidirectional roughness is investigated via varying the roughness of the counter body in the fretting experiments. As expected, experimental results show a large effect of the contact roughness on the crack nucleation conditions. Rationalisation of the crack nucleation boundary independently of the studied roughnesses was successfully obtained by introducing the concept of effective contact area. This does show that the fretting crack nucleation of the studied material can be efficiently described by the local effective loadings inside the contact. Analytical prediction of the crack nucleation is presented with the Smith-Watson-Topper (SWT) parameter and size effect is also studied and discussed.
Unravelling the mechanisms underlying crack initiation in additively manufactured steel
University of Michigan（密歇根大学）；ESRF, The European Synchrotron（欧洲同步辐射装置）；Michigan Center for Materials Characterization, University of Michigan（密歇根大学材料表征中心）；ENSCM（法国国家化学工程学院）；Imperial College London（伦敦帝国理工学院）；Mines Paris, PSL University（巴黎矿业学院，PSL大学）
Application of a linear elastic - brittle interface model to the crack initiation and propagation at fibre-matrix interface under biaxial transverse loads
A phase field model of coupled crack and dislocations: emission, blunting, and the necessity of dissipative toughening
Institute for Advanced Study in Technology, Ton Duc Thang University（越南胡志明市光中大学先进技术研究院）；Faculty of Civil Engineering, Ton Duc Thang University（越南胡志明市光中大学土木工程学院）
