Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.19/2806
Título: Mixed Mode interlayer fracture of glass fiber/nano-enhanced epoxy
Autor: Silva, H.
Ferreira, J. A. M.
Capela, C.
Richardson, M.O.W
Palavras-chave: Glass fibres Particle-reinforcement
Delamination
Fracture toughness
Damage mechanics
Mechanical testing
Data: 27-Mai-2014
Editora: ELSEVIER
Resumo: Increasing interlaminar fracture toughness (IFT) has long been an important goal in the fiber reinforced composites field. For that purpose some research has recently explored the use of nanoparticle reinforced matrices to improve interlaminar strength. In this present paper a small quantity of nanoclays (NC) and multiwalled carbon nanotubes (MWCNT) were used in order to enhance the IFT of glass fiber/epoxy composite laminates. The composites sheets were produced by a vacuum molding process. Mode I, Mode II, and Mixed-Mode I/II tests were performed to determine critical strain Energy release rates, using double cantilever beam, end-notched flexure, and Mixed-Mode Bending specimens, respectively. Significant improvements in IFT were obtained for all loading modes by the incorporation of NC into the epoxy resin, whilst MWCNT produced only moderate improvements. For Mode I, IFT improvement by the incorporation of nanoparticle fillers, reached about 31% for 3 wt% of NC and 17% for 1 wt% of MWCNT. In Mode II the increase was about 50% for 3 wt% of NC and 30% for 1 wt% of MWCNT. The dispersion of small quantities NC and MWCNT into matrices significantly improved Mixed-Mode IFTs for all loading mode ratios GII/G. The total fracture toughness G increased under Mode II loading components and linear Mixed-Mode fracture criteria reproduced the Gc versus Mode ratios GII/G and GI versus GII relationship.
Peer review: yes
URI: http://hdl.handle.net/10400.19/2806
DOI: 10.1016/j.compositesa.2014.05.011
Aparece nas colecções:ESTGV - DEMGI - Artigos publicados em revista científica (Indexados à ISI)

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
1-2014 Composites Part A.pdf2,76 MBAdobe PDFVer/Abrir    Acesso Restrito. Solicitar cópia ao autor!


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.