Interlaminar crack onset in co-cured and co-bonded composite joints under mode I cyclic loading

Autor(es)

Shiino, Marcos Yutaka ^[1] ; Gonzalez Ramirez, Francis Mariana ^[2] ; Garpelli, Felipe Parise ^[2] ; Alves da Silveira, Nubia Nale ^[2] ; Mendonca Sales, Rita de Cassia ^{[2, 3]} ; Donadon, Mauricio Vicente ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Unesp, Dept Engn Ambiental, Inst Ciencia & Tecnol, BR-12247004 Sao Jose Dos Campos - Brazil

^[2] Inst Tecnol Aeronaut ITA, Div Engn Aeronaut, Praca Marechal do Ar Eduardo Gomes, BR-12228900 Sao Jose Dos Campos, SP - Brazil

^[3] Fac Tecnol Sao Jose dos Campos Prof Jessen Vidal, Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES; v. 42, n. 3, p. 752-763, MAR 2019.
• Citações Web of Science: 0

Resumo

Composite joints exhibit different behavior in regard to delamination resistance when dealing with fatigue phenomenon. This research work focuses on an investigation to understand the failure mechanisms on the interfacial strength domain for delamination onset in cocured and cobonded joints. The analysis was based on strain energy release rate versus number of cycles plots that were obtained from fatigue tests in mode I with a stress ratio R = 0.1. The analysis encompassed from the microscopic to mesoscopic level obtained from scanning electron microscopic, and the images processed to extract the most relevant fracture patterns. The main difference between the two technologies was the stress concentration at the crack tip in which the cobonded joint presents a fabric carrier that blunts the adhesive layer, then delaying the delamination. This paper provides important information and guidelines to aid designers in the selection of the best composite joint for high-performance structural applications. (AU)

• Processo FAPESP: 11/01937-0 - Taxa de delaminação em compósitos 5HS carbono/epóxi processado via RTM: relação do carregamento axial tração-tração como modos I e II puros
• Beneficiário: Marcos Yutaka Shiino
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/07646-0 - Avaliação do efeito do gradiente de pressão no processamento RTM em laminado 5HS por DCB no modo i em fadiga
• Beneficiário: Marcos Yutaka Shiino
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 15/16733-2 - Modelagem de Junções Coladas para Aplicações em Estruturas Aeronáuticas de Materiais Compósitos
• Beneficiário: Mariano Andrés Arbelo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado