Fatigue damage evolution in woven composites with different architectures. (February 2023)

• Record Type: Journal Article
• Authors: Lamon, F.; Maragoni, L.; Carraro, P.A.; Quaresimin, M.
• Is Part Of: International journal of fatigue. Volume 167:Part B(2023)
• Publication Date: 2023-02
• Subjects: Composites -- Crack formation -- Crack growth rate -- Damage -- Matrix cracking; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2022.107365
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: The fabric architecture affects qualitatively and quantitatively the fatigue crack initiation. A lower life to crack initiation was found for plain fabrics with respect to twill. The difference is attributed to the local stress distribution in the bundles. Local stresses in the bundles can be calculated through a multi-scale model. The crack initiation is driven by the local stresses in the bundles. Abstract: The influence of the reinforcement architecture on the fatigue behaviour of woven composites is evaluated. Glass/epoxy laminates with stacking sequence UD-woven-UD were produced with the woven layer at 0/90° and ± 45°. Plain and twill fabrics with the same matrix and fibres were used. The damage evolution was monitored during tension-tension fatigue tests, leading to a comparison between laminates based on life to crack initiation, crack growth and crack density evolution. The fatigue behaviour in terms of life to crack initiation was found to be predicted through local stresses in the matrix of the bundles, calculated using a recent multi-scale model.