Enhancement of mode I fracture toughness of adhesively bonded secondary joints using layup patterning of CFRP - ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Enhancement of mode I fracture toughness of adhesively bonded secondary joints using layup patterning of CFRP

Résumé

This work aims to analyse the influence of the CFRP layup patterning on the crack path of composite bonded joints and evaluate its effect on the mode I fracture toughness. An experimental program has been performed using Double Cantilever Beam tests with three different CFRP layup patterning and two adhesives. In addition, a finite element analysis was also implemented to further identify different damage mechanisms during the tests. The outcome shows that different substrate CFRP layup patterning results in distinct crack onsets and propagation paths during the tests, also influenced by the type of adhesive used. Furthermore, an enhancement of around 25% in the joint's onset fracture toughness was observed with the layup patterning compared to a reference joint (with unidirectional layup). Thus, the substrate's patterning morphology seems to be a promising method to increase the mode I fracture toughness of the studied secondary joints.
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Dates et versions

hal-04060384 , version 1 (06-04-2023)

Identifiants

  • HAL Id : hal-04060384 , version 1

Citer

R.A.A. Lima, A Oswal, N. Roux, Anna Bernasconi, M. Carboni, et al.. Enhancement of mode I fracture toughness of adhesively bonded secondary joints using layup patterning of CFRP. 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022, Jun 2022, Lausanne (CH), Switzerland. pp.796 - 803. ⟨hal-04060384⟩
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