resumo
In this paper, the effect of a novel fibre reinforcement architecture in the adhesively bonded joint efficiency of natural fibre reinforced composites (NFRC) was investigated. Two different reinforcement techniques were used: intralaminar reinforcement (2D) and orthogonal-through-the-thickness reinforcement (3D). The aim of the novel architecture is to enhance the transverse properties of the adherend (transverse strength and fracture toughness) in order to delay or avoid delamination failures. A jute bidirectional fabric was used as a base primary reinforcement phase and curaua, sisal, ramie, hemp and glass fibres were used as secondary reinforcement phases for the 2D and 3D fibre reinforcement architectures. Single lap joints (SLJs) bonded with an epoxy adhesive used in the automotive industry were fabricated with these adherends and the efficiency of the joints was investigated by comparing them to glass (GFRP) and carbon (CFRP) pure synthetic fibre reinforced composite joints. It was found that the novel architecture was successful in reaching the failure load of the synthetic composite joints for SISAL 3D, CURAUa 2D and CURAUa 3D SLJs. Therefore, NFRC bonded joints can be a viable replacement for synthetic fibre composite joints at no load-bearing loss.
palavras-chave
MECHANICAL-PROPERTIES; FRACTURE-BEHAVIOR; STRENGTH; CRIMP; MODE
categoria
Engineering; Materials Science; Mechanics
autores
de Queiroz, HFM; Neto, JSS; Cavalcanti, DKK; Banea, MD
nossos autores
Mariana Banea
Professor Auxiliaragradecimentos
This work was supported by the Brazilian Research Agencies: National Council for Scientific and Technological Development (CNPq)- Grant number 311079/2020-2, and Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ)- Grant number E-26/211.072/2019 and E-26/202.728/2019.