Assessment of Cumulative Damage by Using Ultrasonic C-Scan on Carbon Fiber/Epoxy Composites Under Thermal Cycling

Autor(es)

Shiino, Marcos Yutaka ^[1] ; Magalhaes Faria, Maria Candida ^[1] ; Botelho, Edson Cocchieri ^[1] ; de Oliveira, Pedro Carlos ^[2]

Afiliação do(s) autor(es)

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

^[2] Univ Sao Paulo, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 15, n. 4, p. 495-499, JUL-AUG 2012.
• Citações Web of Science: 5

Resumo

In recent years, structural composites manufactured by carbon fiber/epoxy laminates have been employed in large scale in aircraft industries. These structures require high strength under severe temperature changes of -56 degrees until 80 degrees C. Regarding this scenario, the aim of this research was to reproduce thermal stress in the laminate plate developed by temperature changes and tracking possible cumulative damages on the laminate using ultrasonic C-scan inspection. The evaluation was based on attenuation signals and the C-scan map of the composite plate. The carbon fiber/epoxy plain weave laminate underwent temperatures of -60 degrees to 80 degrees C, kept during 10 minutes and repeated for 1000, 2000, 3000 and 4000 times. After 1000 cycles, the specimens were inspected by C-scanning. A few changes in the laminate were observed using the inspection methodology only in specimens cycled 3000 times, or so. According to the found results, the used temperature range did not present enough conditions to cumulative damage in this type of laminate, which is in agreement with the macro - and micromechanical theory. (AU)

• Processo FAPESP: 05/54358-7 - Influência do condicionamento higrotérmico nas propriedades mecânicas de compósitos com aplicações aeronáuticas
• Beneficiário: Edson Cocchieri Botelho
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 09/04123-4 - Desenvolvimento de compósitos processados por RTM para componentes de trem de pouso
• Beneficiário: Marcos Yutaka Shiino
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• 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: 06/02121-6 - Compósito processado via RTM
• Beneficiário: Maria Odila Hilário Cioffi
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores