Mode-I interlaminar fracture of carbon/epoxy cross-ply composites

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

de Morais, AB (Autor) Outra; de Moura, MF (Autor) FEUP; Marques, AT (Autor) FEUP; de Castro, PT (Autor) Outra

Revista

Título: Composites Science and Technology

Vol. 62 Nº 5

Páginas: 679-686

ISSN: 0266-3538

Editora: Elsevier

Indexação

ISI Web of Knowledge - 93 Citações

Scopus - 141 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: P-000-R09

DOI: 10.1016/s0266-3538(01)00223-8

Abstract (EN): Mode-I double-cantilever beam (DCB) tests were performed on carbon/epoxy [0degrees/90degrees](12) specimens. The starter crack was created at mid-thickness, between the 0 and 90degrees mid-layers. During the tests, however, the crack also propagated along the neighbouring 0degrees/90degrees interface and within the 90degrees mid-layer. Nevertheless, the test results were apparently consistent with the assumptions of the corrected beam theory (CBT) that was used to obtain the interlaminar critical strain energy release rate, G(Ic). The measured values were higher than those of unidirectional [0degrees](24) specimens, especially the final propagation values. A finite-element analysis confirmed the applicability of the CBT for interlaminar propagation along the two 0degrees/90degrees interfaces. The results also indicated that the intralaminar G(Ic) is significantly smaller than the interlaminar G(Ic). This will prevent pure interlaminar propagation in multi-directional specimens with high interlaminar fracture toughness.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8