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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.)

Effects of temperature and moisture on the fracture behaviour of composite adhesive joints

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Brito, C. B. G. [1, 2] ; Sales, R. C. M. [1, 3] ; Donadon, V, M.
Total Authors: 3
[1] V, Inst Tecnol Aeronaut, Div Engn Aeronaut, Praca Marechal Eduardo Gomes 50, Sao Jose Dos Campos 12228900, SP - Brazil
[2] Delft Univ Technol TU Delft, Kluyverweg 1, Delft 2629 HS - Netherlands
[3] Fac Tecnol Sao Jose Dos Campos Prof Jessen Vidal, Av Cesare Mansueto Giulio Lattes 1350, Sao Jose Dos Campos 12247014, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Web of Science Citations: 0

Mode I interlaminar fracture toughness of CFRP joints co-cured and co-bonded was experimentally characterised under several environmental conditions. Two test campaigns were carried out: one with as-received specimens tested at -54 degrees C and 25 degrees C, and another with hygrothermally aged samples tested at 25 degrees C and 80 degrees C. Dynamic mechanical analysis and scanning electron microscopy were used to explain distinct results. For co-cure, the propagation onset for as-received samples started at the interlayer region between the two adherends before migrating deeper into the adherend, while for as-received co-bonded samples, propagation onset was mainly cohesive. After aging, both bonding techniques failed directly in the adherend, in a fibre-tear fashion. Thus, the aging process presented a higher influence on failure mechanisms than the testing temperature. Regarding performance, mode I fracture toughness did not present a great variation for co-cured samples, since failure locus was always in the adherend. However, the initiation mode I fracture toughness of co-bonding decreased between as-received and aged samples. This difference is attributed to the presence of the adhesive in co-bonded systems, which showed to be more affected by environmental conditions than systems formed by fibre and matrix only, such as co-cured ones. (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