[en] This article is focused on the study of the contribution of aramid fibers in a hybrid carbon–aramid fiber twill weave used to reinforce epoxy resin. To evaluate the influence of the aramid fibers, a comparative study between carbon and carbon–aramid woven–reinforced composites, considering the mechanical behavior of both materials under several loading conditions, is performed. The tests used in this study are meant to analyze the effect of aramid reinforcements on the composite stiffness, strength, impact, and fracture performance. Higher values of energy absorption and fracture toughness were exhibited by the carbon–aramid composite. The mechanical tests performed indicated that the aramid phase present in the hybrid carbon–aramid composite induced an important enhancement on the impact (37.9% in energy absorption) and fracture resistance (12.7% for fracture initiation and 43% for steady state regime), compared to small reductions on the material stiffness. In addition, the ultimate strain and the through thickness compression strength were favorably affected, with an increase up to 19.5% and 8.3%, respectively, by the presence of aramid fiber that presents a more ductile response with respect to the carbon reinforcement.
Disciplines :
Materials science & engineering
Author, co-author :
Pincheira, Gonzalo; Department of Materials Engineering, University of Concepción, Concepción, Chile
Canales, Cristian; Department of Aerospace & Mechanical Engineering, University of Liège, Liège, Belgium
Medina, Carlos; Department of Materials Engineering, University of Concepción, Concepción, Chile
Fernandez Sanchez, Eduardo Felipe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire ; University of Concepcion, Chile > Mechanical Engineering
Flores, Paulo; Department of Mechanical Engineering, University of Concepción, Concepción, Chile
Language :
English
Title :
Influence of aramid fibers on the mechanical behavior of a hybrid carbon–aramid–reinforced epoxy composite
Publication date :
2018
Journal title :
Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Applications
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The financial support by CONICYT through the projects Fondef D08i1138 and CONICYT Regional (CIPA/R08C1002) is gratefully acknowledged.
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