Bilinear approximations to the mixed-mode I-II delamination cohesive law using an inverse method

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

de Moura, MFSF (Autor) FEUP; A. B. de Morais (Autor) Outra; A. B. Pereira (Autor) Outra; Filipe Silva (Autor) FEUP; N. Dourado (Autor) Outra

Revista

Título: Composite Structures

Vol. 122

Páginas: 361-366

ISSN: 0263-8223

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 25 Citações

Classificação Científica

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia mecânica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-00A-2HN

DOI: 10.1016/j.compstruct.2014.11.058

Abstract (EN): This paper presents an experimental and numerical study of the mixed-mode I-II delamination of unidirectional carbon/epoxy laminates. Double cantilever beam, end-notched flexure and mixed-mode bending tests were conducted in order to cover the full range of mode-mix combinations. Finite element cohesive zone models with a bilinear softening cohesive law were subsequently employed to fit experimental load-displacement curves. This required a genetic algorithm to find optimal bilinear softening parameters. Good agreement was achieved between predicted and experimental curves. Furthermore, the bilinear softening parameters showed consistent variations with the global mode-mix that could be interpreted in terms of local damage mechanisms. Nevertheless, further research is needed to define mixed-mode tractions and separations leading to a unique cohesive law.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6