[Mécanismes de fissuration transverse induits par des fissures matricielles dans des plis adjacents de stratifiés composites]
La fissuration dans les stratifiés composites, contenant des plis orientés à θ° de la direction de chargement adjacents à des plis à 90°, est étudiée expérimentalement et numériquement à l’aide du critère couplé et de calculs par éléments finis. Différents mécanismes d’endommagement sont pris en compte : la fissuration transverse dans le pli à 90°, la fissuration dans les plis à θ°, ou la décohésion entre des plis adjacents d’orientation différente. L’influence de la séquence d’empilement sur la séquence des mécanismes d’endommagement est analysée. Les observations expérimentales effectuées sur des stratifiés sollicités en traction mettent en évidence une fissuration dans les plis à θ : (i) à un niveau de déformation imposé beaucoup plus élevé que celui de la première fissuration transverse dans les plis à 90° pour une désorientation suffisamment grand entre les plis adjacents, ou (ii) à un niveau de déformation imposé similaire si l’angle de désorientation entre deux plis adjacents est faible. Ce dernier phénomène peut être atténué par la présence d’un pli à 0° entre le pli à 90° et les plis à θ.
Ces conclusions sont appuyées par des simulations numériques des mécanismes d’endommagement observés expérimentalement, mettant en évidence un changement dans la séquence des mécanismes en fonction de l’angle de désorientation des plis à θ. Les simulations numériques montrent également que la décohésion entre plis adjacents peut se produire et devenir plus favorable que le ré-amorçage des fissures dans les plis adjacents lorsque l’angle de désorientation entre ces plis est suffisamment grand.
Cracking in composite laminates containing θ-plies adjacent to 90° plies is studied experimentally and numerically using the coupled criterion and finite element calculations. Different damage mechanisms are considered, namely transverse cracking in 90°, cracking in θ-plies, or debonding between adjacent misoriented plies. The influence of the stacking sequence on the damage mechanism sequence is investigated. Experimental observations of the composite edge under tensile loading evidence θ-ply cracking (i) at an imposed strain level much larger than first transverse cracking in 90° ply for a sufficiently large orientation mismatch between adjacent plies or (ii) at a similar imposed strain level if the mismatch angle between two adjacent plies is small. The latter phenomenon may be mitigated by the presence of a 0° ply between the 90° and the θ-plies.
These conclusions are supported by numerical simulation of the experimentally observed damage mechanisms, evidencing a change in the damage mechanism sequence depending on the θ-ply misorientation. The numerical simulations also highlight that debonding between adjacent plies may occur as it becomes more favorable that adjacent ply crack re-initiation for sufficiently large adjacent ply mismatch angle.
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Mots-clés : Mécanique de la rupture incrémentale, Critère couplé, Stratifiés, Ré-amorçage de fissures
Nicolas Carrère 1 ; Aurélien Doitrand 2 ; Mathilde Conan 1 ; Eric Martin 3
CC-BY 4.0
@article{CRMECA_2025__353_G1_359_0,
author = {Nicolas Carr\`ere and Aur\'elien Doitrand and Mathilde Conan and Eric Martin},
title = {Mechanisms of transverse cracking induced by adjacent ply matrix cracks in composite laminates},
journal = {Comptes Rendus. M\'ecanique},
pages = {359--377},
publisher = {Acad\'emie des sciences, Paris},
volume = {353},
year = {2025},
doi = {10.5802/crmeca.286},
language = {en},
}
TY - JOUR AU - Nicolas Carrère AU - Aurélien Doitrand AU - Mathilde Conan AU - Eric Martin TI - Mechanisms of transverse cracking induced by adjacent ply matrix cracks in composite laminates JO - Comptes Rendus. Mécanique PY - 2025 SP - 359 EP - 377 VL - 353 PB - Académie des sciences, Paris DO - 10.5802/crmeca.286 LA - en ID - CRMECA_2025__353_G1_359_0 ER -
%0 Journal Article %A Nicolas Carrère %A Aurélien Doitrand %A Mathilde Conan %A Eric Martin %T Mechanisms of transverse cracking induced by adjacent ply matrix cracks in composite laminates %J Comptes Rendus. Mécanique %D 2025 %P 359-377 %V 353 %I Académie des sciences, Paris %R 10.5802/crmeca.286 %G en %F CRMECA_2025__353_G1_359_0
Nicolas Carrère; Aurélien Doitrand; Mathilde Conan; Eric Martin. Mechanisms of transverse cracking induced by adjacent ply matrix cracks in composite laminates. Comptes Rendus. Mécanique, Volume 353 (2025), pp. 359-377. doi : 10.5802/crmeca.286. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.286/
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