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Title: Effects of external patch configuration on repaired composite laminates subjected to multi-impacts
Authors: Coelho, S. R. M. 
Reis, P. N. B. 
Ferreira, J. A. M 
Pereira, A. M. 
Keywords: Composite structure; Bonded composite repair; External patch repair; Impact tests
Issue Date: 2017
Publisher: Elsevier
Serial title, monograph or event: Composite Structures
Abstract: This work intends to study the impact performance of repaired composites by the overlap patch technique and, for this purpose, experimental tests were carried out on single and double-patch specimens. In order to evaluate the impact fatigue strength, both configurations were submitted to multi-impacts, until the full perforation occurs. It was possible to conclude that the double-patch geometry supports higher maximum loads, lower displacements and promotes higher elastic energies. Relatively to the impact energy of 6 J, for example, the maximum load and the elastic energy is 97.1% and 51.2% higher, respectively, but the maximum displacement is about 50% lower than the values obtained with the single-patch geometry. Higher impact fatigue life was also observed, as consequence of its higher stiffness. The impact bending stiffness confirms the difference of stiffness between them, and shows to be a parameter able to monitor the damage progression.
ISSN: 0263-8223
Other Identifiers: 10.1016/j.compstruct.2017.02.069
DOI: 10.1016/j.compstruct.2017.02.069
Rights: openAccess
Appears in Collections:FCTUC Eng.Electrotécnica - Artigos em Revistas Internacionais

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