Shear driven crack arrest investigation under compressive state: Prediction of fretting fatigue failure of aluminium strands

• Published in: International journal of fatigue Vol. 136; p. 105589
• Main Authors: Said, Julien, Fouvry, Siegfried, Cailletaud, Georges, Yang, Christine, Hafid, Fikri
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.07.2020; Elsevier BV; Elsevier
• Subjects: Aluminium; Aluminum; Crack arrest; Crack initiation; Crack propagation; Engineering Sciences; Fatigue cracks; Fatigue failure; Fatigue tests; Fracture mechanics; Fretting fatigue; Materials; Materials fatigue; Mechanics; Mechanics of materials; Mode II mechanisms; Nucleation; Strands; Stress Intensity Factors; Mode II mechanisms; Aluminium; Crack arrest; Fretting fatigue; Stress Intensity Factors
• ISSN: 0142-1123; 1879-3452
• DOI: 10.1016/j.ijfatigue.2020.105589

•Crack arrest investigation using fretting fatigue experiments on aluminium strands.•3D finite element modelling of cracks and SIF calculations along the crack front.•The highlight of propagating cracks under highly compressive states.•Shear driven cracks.•Friction characterization between the crack lips. Fretting fatigue crack propagation in aluminium strands was investigated through experimental tests and FEM simulations. Fretting fatigue tests revealed that crack nucleation predictions are not sufficient to fully predict the total strand failure, and crack arrest conditions may be reached for nucleated cracks. The geometry of arrested cracks was characterized and used to perform simulations using FEM in order to dedude Stress Intensity Factor (SIF) distributions along the crack front. These results showed that even in a fully compressive state, cracks are still able to propagate to a certain extent, and a mode II SIF threshold has been proposed.