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Damage onset modeling in woven composites based on a coupled stress and energy criterion

Abstract : The crack onset configuration at damage onset in a four-layer plain weave glass fiber/epoxy matrix composite is studied at the mesoscopic scale using a coupled criterion based on both a stress and an energy condition. The possible crack shapes are selected based on optical microscope observations of damage mechanisms on a specimen edge during a tensile test. The crack location, length and orientation, the decohesion length and the strain at damage onset are determined. The damage onset strain is underestimated compared to the experimental value determined by acoustic emission if only a stress criterion is considered. The coupled stress and energy criterion leads to a more reasonable estimate of strain at damage onset.
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https://hal.archives-ouvertes.fr/hal-01474372
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Submitted on : Monday, February 22, 2021 - 3:46:11 PM
Last modification on : Monday, March 14, 2022 - 11:08:07 AM
Long-term archiving on: : Sunday, May 23, 2021 - 6:58:27 PM

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Aurélien Doitrand, Christian Fagiano, Nicolas Carrere, Vincent Chiaruttini, Martin Hirsekorn. Damage onset modeling in woven composites based on a coupled stress and energy criterion. Engineering Fracture Mechanics, Elsevier, 2017, 169, pp.189-200. ⟨10.1016/j.engfracmech.2016.11.021⟩. ⟨hal-01474372⟩

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