An experimental analysis of fracture mechanisms by acoustic emission of woven composite bolted assembly

Numéro de la revue: 32
Auteurs: Youcef Faci*1 &  Mostefa Baccouche2

1Centre Nationale de recherche scientifique et technique en soudage et Contrôle,
BP 64 Route Dely Brahim, Cheraga 1600, Alger Algérie.
 2Laboratoire de Métallurgie physique et Propriété des Matériaux, Université Badji Mokhtar Annaba,,
BP 12, Annaba, 23000. Algérie.

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Abstract

This work is focused on the study of the evolution of damage mode and failure mechanisms of woven composite bolted assembly carbon fiber/epoxy. In the present paper three configurations are studied [0°,45°,0°,45°], [0°,45°,0°,45°]s and [0°,45°,0°,45,0°]s. In order to analyze a global mechanical behavior of the assembly, monotonous tensile tests are performed. The damage evolution is followed simultaneously by acoustic emission (A.E) and digital image correlation (D.I.C). Acoustic signatures of four modes of damage are identified, matrix cracking, fiber-matrix debonding, delaminating and fiber breakage, then confirmed by microscopic observations in scanning electron microscopy (SEM).

Keywords: Woven composite- Acoustic emission- bolted assembly- digital image correlation- Damage.