Mode II interlaminar fracture of carbon/epoxy multidirectional laminates

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

A. B. Pereira (Autor) Outra; Alfredo Morais (Autor) FEUP; António Torres Marques (Autor) FEUP; Paulo Tavares de Castro (Autor) FEUP

Revista

Título: Composites Science and Technology

Vol. 64 Nº 2

Páginas: 1653-1659

ISSN: 0266-3538

Editora: Elsevier

Indexação

ISI Web of Knowledge - 33 Citações

Scopus - 59 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-000-937

DOI: 10.1016/j.compscitech.2003.12.001

Abstract (EN): This paper reports an experimental study on the mode II interlaminar fracture of carbon/epoxy multidirectional laminates. A 3D finite element analysis was first performed to define appropriate stacking sequences for end-notched flexure (ENF) specimens with starter delaminations on theta/-theta and 0degrees/theta interfaces. The analysis concerned the shape of widthwise distributions of the mode 11 strain energy release rate, G(II), the level of mode-mixity, the effect of residual stresses on G(II) and the applicability of data reduction schemes. The experimental G(IIc) values increased with the ply angle 0 for both theta/-theta and 0'/theta specimens. These trends were found to be in agreement with an average interlaminar stress fracture criterion. However, this criterion proved to be of limited practical usefulness, as its predictions were dependent on a characteristic length. Therefore, G(IIc) measurements on multidirectional specimens remain essential for the application of accurate fracture mechanics based design criteria.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7