Influence of out-of-plane fiber waviness and different environmental conditionings on mechanical and morphological characteristics of fiber glass/epoxy laminates

Author(s):Show less -

Barros, Andre Santiago ^[1] ; Vieira, Leonardo de Souza ^[2] ; de Melo Morgado, Guilherme Ferreira ^[2] ; Ribeiro dos Anjos, Erick Gabriel ^[2] ; Monteiro de Souza, Gabriel Portilho ^[2] ; Romeu Lino de Souza, Maria Fernanda ^[2] ; Wearn, Yves Nicolau ^[2] ; Braga De Nardi, Antonio Luis ^[2] ; Ribeiro Coimbra, Maria Claudia ^[2] ; de Moura, Nayara Koba ^[2] ; Leite, Cristiano Idalgo ^[2] ; Rezende, Mirabel Cerqueira ^[2]

Affiliation

^[1] Nordex Energy GmbH, Rostock - Germany

^[2] Fed Univ Sao Paulo UNIFESP, Polymer & Biopolymer Technol Lab TecPBio, Talim St, BR-12231280 Sao Jose Dos Campos - Brazil

• Document type: Journal article
• Source: JOURNAL OF COMPOSITE MATERIALS; v. 56, n. 3 NOV 2021.
• Web of Science Citations: 0

Abstract

The use of structural polymeric composites constitutes an interesting option in the area of wind turbine blade manufacturing. Nevertheless, thick composite components may present out-of-plane waviness in their fibers, compromising the service life of the wind blades. In this context, the present study aims to study the influence of out-of-plane waviness in the fibers with different degrees of severity as well as to verify the effect of fiber glass/epoxy resin composites immersion in distilled water and saline solution in their tensile strength (sigma(max)), modulus of elasticity (E), and deformation at break (epsilon(rup)), analyzing the reinforcement/matrix interface changes. The results showed that the increase in severity promoted, in general, a statistically significant deterioration in sigma(max) of the samples exposed to the same environmental conditioning. The conditioning led to a decrease in E and an increase in epsilon(rup), attributed to the deterioration of the interface and the plasticization of the polymeric matrix, respectively, as evidenced by fractographic analysis. The effect of severity on the epsilon(rup) and sigma(max) properties was only noticed in laminates exposed to environmental conditioning, due to water sorption favoring the deterioration of the matrix/reinforcement interface, intensifying the deleterious effect of out-of-plane waviness of fibers. (AU)

• FAPESP's process: 18/09531-2 - DEVELOPMENT OF MULTIFUNCTIONAL NANOESTRUCTURED GREEN COMPOSITES BASED ON POLY(FURFURYL ALCOHOL)/GRAFITE NANOSHEETS FOR AEROSPACE APPLICATIONS
• Grantee: Mirabel Cerqueira Rezende
• Support Opportunities: Regular Research Grants