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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Structural components in the aircraft industries often require geometries that induce stress concentration effects, intensifying fatigue phenomena. When combined with a lack of structural monitoring it may limit composite applications. This research focuses on stiffness reduction of a notched carbon fiber laminate subjected to tension-tension fatigue load. The stiffness reduction was monitored during the cyclic tests by the use of the impulse excitation technique. Three major degradation stages were observed, the initial stage showed a high degradation rate followed by constant modulus degradation. The last stage was related to the presence of extensive delamination occurring outside of the notch area.

Fatigue and Aeronautical Materials Research Group Department of Materials and Technology UNESP - Univ. Estadual Paulista, 12516-410 Guaratinguetá

ICT UNESP - Univ. Estadual Paulista

Instituto de Estudos Avançados do Mar (IEAMar) UNESP - Univ. Estadual Paulista

Fatigue and Aeronautical Materials Research Group Department of Materials and Technology UNESP - Univ. Estadual Paulista, 12516-410 Guaratinguetá

ICT UNESP - Univ. Estadual Paulista

Instituto de Estudos Avançados do Mar (IEAMar) UNESP - Univ. Estadual Paulista

CAPES: 001

CNPq: 130696/2017-0

FAPESP: 2006/02121-6