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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Mode I Interlaminar Fracture Toughness Analysis of Co-Bonded and Secondary Bonded Carbon Fiber Reinforced Composites Joints

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Brito, Camila Belo Gomes [1] ; Sales Contini, Rita de Cassia Mendonca [2, 1] ; Gouvea, Ricardo Francisco [1] ; de Oliveira, Arthur Scaglioni [2] ; Arbelo, Mariano Andres [1] ; Donadon, Mauricio Vicente [1]
Total Authors: 6
[1] ITA, Dept Estruturas Aeroespaciais, Pca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[2] Fac Tecnol Sao Jose dos Campos FATEC SJC, Lab Estruturas Leves, Ave Cesare Mansueto Giulio Lattes S-N, BR-12247014 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 3

Aiming to reduce aircraft weight, aeronautic industry seeks alternative materials and processes used to join its different structural parts. An option to traditional methods are high performance adhesive joints, which reduce weight, number of parts and component final cost, also resulting in higher strength structures. Although, the lack of experimental data to provide a detailed structural characterization of these joining techniques had limited their commercial application. The proposal of this work is to investigate the Mode I interlaminar fracture toughness under quasi-static loading using DCB specimens of carbon composite joints made by co-bonding and secondary bonding techniques, the latter giving more reliable results. For a better understanding on the failure in the systems, DSC and microscopy techniques were applied, from which three stages of delamination process during testing were observed: 1st Stage) Cohesive failure represented by an unstable crack propagation from a high energy level; 2nd Stage) transition from cohesive to adhesive and final intralaminar failure mode with lower energy levels than Stage 1; and 3rd Stage) completely stable propagation at low energy levels (delamination migrates from intralaminar to interlaminar, entirely in the substrate). (AU)

FAPESP's process: 15/16733-2 - Modelling of bonded joints in composite material structures for aeronautic applications
Grantee:Mariano Andrés Arbelo
Support Opportunities: Scholarships in Brazil - Post-Doctoral