Analysis of adhesive scarf repairs on composite sandwich beams under three-point bending loading
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Ricardo Jorge Braga Rocha [2] ; Marcelo Francisco de Sousa Ferreira de Moura [1] ; Raul Domingos Ferreira Moreira [2]
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[1] Universidade Do Porto
Universidade Do Porto
Santo Ildefonso, Portugal
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[2] INEGI – Instituto de Ciência e Inovação em Engenharia Mecânica e Engenharia Industrial, Porto, Portugal
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- Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 52, Nº. 10, 2024, págs. 7271-7282
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
The efficiency of a repair strategy applied to a honeycomb/carbon-epoxy sandwich beam was analyzed in this work. Experimental tests were performed considering three-point bending loading of undamaged, damaged and repaired specimens. In the damaged case, the central part of the core and of one of the skins were removed. The repair scheme consists of bonding a plug of honeycomb into the core and repairing the carbon-epoxy skin considering a scarf patch. A finite element analysis incorporating cohesive zone mixed-mode I + II analysis was performed. The resultant load-displacement numerical curves were compared with the experimental ones. It was verified that the repair procedure is efficient regarding recovery of the initial stiffness and strength of the undamaged case, and it was concluded that the proposed numerical model is a valid tool to deal with repair of sandwich beams.
