Shear fatigue of the bonded and frictional interface under constant normal pre-stress. (January 2015)

• Record Type: Journal Article
• Authors: Hurme, S.; Marquis, G.
• Is Part Of: International journal of fatigue. Volume 70(2015)
• Page Start: 1
• Page End: 12
• Publication Date: 2015-01
• Subjects: Adhesive joints -- Damage -- Fatigue test methods -- Interface -- Low cycle fatigue; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2014.08.014
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Low-cycle shear fatigue of bonded and clamped steel interfaces is studied. The physical nature of fatigue damage is studied with scanning electron microscopy. The damage consists of small cracks with different lengths and orientations. A phenomenological fatigue damage evolution model is proposed. The cohesive zone model is re-formulated to account for fatigue damage. Abstract: Fatigue damage in the idealised bonded interfaces under constant normal pre-stress is studied by scanning electron microscopy and it is found to involve several microstructurally small cracks with different lengths and orientations. Evolution of fatigue damage in the adhesive occurs as the small cracks grow, coalesce and interact with each other. The theory related to these phenomena is not yet established. Therefore, a phenomenological model of fatigue damage is proposed based on the experimentally-measured compliance of the modified napkin ring specimen. The cohesive zone law describing the quasi-static fracture of the interface is re-formulated to include the effect of fatigue damage.