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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.)

Experimental characterization of Mode I fatigue delamination growth onset in composite joints: A comparative study

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Gonzalez Ramirez, Francis Mariana [1] ; Garpelli, Felipe Parise [1, 2] ; Mendonca Sales, Rita de Cassia [1, 3] ; Candido, Geraldo Mauricio [1] ; Arbelo, Mariano Andres [1] ; Shiino, Marcos Yutaka [4] ; Donadon, Mauricio Vicente [1]
Total Authors: 7
[1] Inst Tecnol Aeronaut, Div Engn Aeronaaut, BR-12228900 Sao Paulo - Brazil
[2] Inst Pesquisas Tecnol, Lab Estruturas Leves, BR-12210131 Sao Paulo - Brazil
[3] Fac Tecnol Sao Jose dos Campos, BR-12247014 Sao Paulo - Brazil
[4] Univ Estadual Paulista, Inst Ciencia & Tecnol, Dept Engn Ambiental, BR-12224300 Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: MATERIALS & DESIGN; v. 160, p. 906-914, DEC 15 2018.
Web of Science Citations: 0

This work focuses on Mode I fatigue induced delamination growth onset characterization of co-cured (CC), co-bonded (CB) and secondary bonded (SB) composite joints with an epoxy interleaf. The CC joints used in this work comprise only fibers and resin, while, CB and SB joints contain an adhesive film. Experimental tests were carried out at room temperature using double cantilever beam (DCB) specimens. The delamination behavior was evaluated in terms of the strain energy release rate (SERR) considering a no-growth criterion based on 10(6) cycles without crack propagation. For Mode I cyclic loading, the threshold values of the CB and SB joints were about 2.5 times higher than the one achieved by the CC joints, presenting a better performance in terms of fatigue delamination growth-onset. A fractographic study was conducted using scanning electron microscopy in order to relate the SERR results with the joint's failure mechanisms. It was observed that there is a good mechanical compatibility between the substrate and adhesive in the CB and SB joints studied herein. The results found in this paper indicated that the Mode I SERR threshold values were not significantly affected by the interleaf. (C) 2018 Elsevier Ltd. All rights reserved. (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