Residual modulus degradation model for woven fabric composite determined by impulse excitation technique

Autor(es)

Avila Dias Maciel, Maisa Milanez ^[1] ; Shiino, Marcos Yutaka ^[2] ; Cornelis Voorwald, Herman Jacobus ^[1] ; Hilario Cioffi, Maria Odila ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista, Dept Mat & Technol, Fatigue & Aeronaut Mat Res Grp, BR-12516410 Guaratingueta, SP - Brazil

^[2] UNESP Univ Estadual Paulista, ICT, BR-12247016 Sao Jose Dos Campos, SP - Brazil

^[3] UNESP Univ Estadual Paulista, Inst Estudos Avancados Mar IEAMar, BR-12247016 Sao Jose Dos Campos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF FATIGUE; v. 133, APR 2020.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 06/02121-6 - Compósito processado via RTM
• Beneficiário: Maria Odila Hilário Cioffi
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores