A simple strategy to perform mixed-mode I+II fatigue/fracture characterisation of composite bonded joints. (May 2022)

• Record Type: Journal Article
• Authors: Moreira, R.D.F.; de Moura, M.F.S.F.; Silva, F.G.A.; Reina, J.P.A.; Rodrigues, T.M.S.
• Is Part Of: International journal of fatigue. Volume 158(2022)
• Publication Date: 2022-05
• Subjects: Composite bonded joints -- Fatigue/fracture characterisation -- Mixed-mode I+II loading -- High-cycle fatigue CZM -- Fatigue life prediction; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2022.106723
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Fatigue/fracture under mixed-mode of composite bonded joints was performed. The ADCB and ASLB mixed-mode I+II fatigue/fracture tests were employed. The evolution of the Paris law coefficients in function of mode ratio was obtained. A high-cycle fatigue CZM under mixed-mode loading was used for procedure validation. Abstract: This work addresses a simple methodology to perform fatigue/fracture characterisation under mixed-mode I+II of composite bonded joints. The asymmetrical double cantilever beam and asymmetrical single-leg bending fatigue/fracture tests were considered to address mode-mixities with predominance of mode I and II, respectively. The modified Paris laws coefficients were correlated with the ones of other tests defining suitable relations describing the evolution of these coefficients as function of mode-mixity. These functions were input in a cohesive zone model appropriate for high-cycle fatigue under mixed-mode loading. It was observed that numerical fatigue lives and Paris laws are in accordance with the experimental results.