resumo
The main objective of this study was to investigate experimentally the mechanical performance of adhesive joints made of additive manufactured (AM) polymeric parts reinforced with different types of fibres. PLA (PolyLactic Acid) and ABS (acrylonitrile butadiene styrene) AM adherends were fabricated by fused deposition modelling (FDM). Further, natural (jute and curau ' a) and synthetic (glass) fibre reinforcement fabrics were laminated on the outer sides of the AM parts using an epoxy resin via compression moulding. The type of reinforcement (natural or synthetic) and the effect of the number of the layers (1 and 2 layers) on the performance of the bonded joints was studied by testing single lap joints (SLJs) bonded with an epoxy structural adhesive. It was found that the me-chanical performance of adhesively bonded SLJs is improved by using different types of fibre reinforcements to the 3D printed core adherends. The failure load varied as a function of fibre type and number of layers used as reinforcement, as well as the material used for the core of the adherends. The ABS SLJs presented lower strength compared to PLA SLJs, mainly due to the ABS adherend inferior mechanical properties. In addition, the PLA core specimens presented a better interface adhesion with the epoxy resin used in this study to laminate the re-inforcements, when compared to the ABS core reinforced specimens. The best results in terms of improvement in failure load were obtained for the curau ' a fibre reinforced PLA 3D printed SLJ specimens (the average joint strength was more than 1.5 times higher than the neat-PLA SLJ specimens).
categoria
Engineering; Materials Science
autores
Cavalcanti, DKK; de Queiroz, HFM; Banea, MD
nossos autores
Mariana Banea
Professor AuxiliarProjectos
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This work was partially supported by the Brazilian Research Agencies: National Council for Scientific and Technological Development (CNPq)- Grant number 311079/2020-2, Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES)- Finance Code 001, 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. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC).