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Early fatigue damage accumulation of CFRP Cross-Ply laminates considering size and stress level effects

Journal Article (2022)
Authors

X. Li (Structural Integrity & Composites)

R. Rinze (Structural Integrity & Composites)

Dimitrios S. Zarouchas (Structural Integrity & Composites)

Research Group
Structural Integrity & Composites
Copyright
© 2022 X. Li, R. Benedictus, D. Zarouchas
More Info
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Publication Year
2022
Language
English
Copyright
© 2022 X. Li, R. Benedictus, D. Zarouchas
Research Group
Structural Integrity & Composites
Volume number
159
DOI:
https://doi.org/10.1016/j.ijfatigue.2022.106811
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Abstract

Ply-block size and stress level effect on accumulation of transverse cracks and delamination are investigated during early fatigue life of CFRP laminates. Tension-tension fatigue tests under different stress levels were performed for two cross-ply configurations. Edge observation with digital cameras, digital image correlation and acoustic emission were employed for in-situ damage monitoring. Transverse cracks were dominant for [0/902]s laminates with almost non-existent delamination, while different interactive levels between both damage mechanisms occurred for [02/904]s laminates. Poisson's ratio identifies whether early fatigue damage is dominant by transverse cracks or involves delamination. Cumulative AE energy is a helpful indicator of crack density.