%0 Conference Proceedings %T Enhancement of mode I fracture toughness of adhesively bonded secondary joints using layup patterning of CFRP %+ Politecnico di Milano [Milan] (POLIMI) %+ Institut de Recherche Dupuy de Lôme (IRDL) %+ Delft University of Technology (TU Delft) %A Lima, R.A.A. %A Oswal, A %A Roux, N. %A Bernasconi, Anna %A Carboni, M. %A Carrere, Nicolas %< avec comité de lecture %@ 978-297016140-0 %( ECCM 2022 - Proceedings of the 20th European Conference on Composite Materials: Composites Meet Sustainability %B 20th European Conference on Composite Materials: Composites Meet Sustainability, ECCM 2022 %C Lausanne (CH), Switzerland %I Composite Construction Laboratory (CCLab), Ecole Polytechnique Federale de Lausanne (EPFL) %V 2 %P 796 - 803 %8 2022-06-26 %D 2022 %K Adhesive joints %K Adhesives %K Cantilever beams %K Cracks %K Ductile fracture %K Morphology %K Software testing %Z Engineering Sciences [physics]/Materials %Z Engineering Sciences [physics]/Mechanics [physics.med-ph]Conference papers %X 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. %G English %L hal-04060384 %U https://ensta-bretagne.hal.science/hal-04060384 %~ UNIV-BREST %~ ENSTA-BRETAGNE %~ CNRS %~ UNIV-UBS %~ UBS %~ ENIB %~ IRDL %~ ENSTA-BRETAGNE-MECA %~ ENSTA-BRETAGNE-PTR5-IRDL