Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 225, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109504
Keywords
Fatigue; Matrix cracking; Damage mechanics; Transverse cracking; Variable amplitude
Categories
Funding
- QUAR_SID19_01-Effect of manufacturing-induced defects on the fatigue response of advanced composite materials
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This work analyzes the transverse crack initiation, propagation, and crack density evolution in cross-ply laminates under two-stage block loadings. A theoretical formulation for cracking probability under variable amplitude blocks is obtained based on the linear damage accumulation rule. The comparison between experimental results and predictions validates the adequacy of the linear damage accumulation rule for crack initiation under block loadings. Investigations of damage evolution at the micro-scale provide mechanistic support to this approach.
In this work, the transverse crack initiation, propagation, and the crack density evolution in cross-ply laminates are analysed under two-stage block loadings. A theoretical formulation for the cracking probability under variable amplitude blocks is obtained based on the linear damage accumulation rule, often adopted in crack density prediction models from the literature. The comparison between the experimental results and the predictions for the cracking probability and the crack density evolution validate, from the phenomenological point of view, the adequacy of the linear damage accumulation rule for crack initiation under block loadings. Investigations of the damage evolution at the micro-scale are also presented, providing a mechanistic support to this approach.
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