Coupled stress and energy analysis of crack onset in textile composites at the mesoscopic scale - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2016

Coupled stress and energy analysis of crack onset in textile composites at the mesoscopic scale

Résumé

A coupled stress and energy criterion is used to analyze crack initiation at the mesoscopic scale in a four-layer plain weave glass-epoxy composite. The choice of possible crack configurations is restricted based upon optical microscope observations of damage mechanisms on a specimen edge during tensile testing. It is found that transverse yarn cracking accompanied by yarn-yarn decohesions around the crack tips is the first damage that occurs in the composite. For the stress condition in the yarns, a criterion developed for modeling failure of unidirectional plies in a laminate is applied. For the energy condition, the difference between the potential energies of an undamaged and a cracked unit cell is calculated, using identical mesh topologies. The energy criterion is found to be dominant in the studied case. It leads to an estimation of the crack initiation strain much closer to experimental observations by acoustic emission than the stress criterion alone and allows to determine crack length and orientation at damage onset. The coupled criterion leads to the conclusion that the yarn-yarn decohesions are a direct consequence of the transverse yarn cracks, and its length can be determined through the energy criterion.

Domaines

Matériaux
Fichier principal
Vignette du fichier
DMSC16028.1466519301.pdf (1.43 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01354646 , version 1 (19-08-2016)

Identifiants

  • HAL Id : hal-01354646 , version 1

Citer

Martin Hirsekorn, Aurélien Doitrand, Christian Fagiano, Vincent Chiaruttini. Coupled stress and energy analysis of crack onset in textile composites at the mesoscopic scale. ECCM17, Jun 2016, MUNICH, Germany. ⟨hal-01354646⟩
168 Consultations
129 Téléchargements

Partager

Gmail Facebook X LinkedIn More