Three-dimensional invariant-based failure criteria for fibre-reinforced composites

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

Autores

Camanho, PP (Autor) FEUP; Arteiro, A (Autor) Outra; Melro, AR (Autor) Outra; Catalanotti, G (Autor) Outra; Vogler, M (Autor) Outra

Revista

Título: International Journal of Solids and Structures

Vol. 55

Páginas: 92-107

ISSN: 0020-7683

Editora: Elsevier

Indexação

ISI Web of Knowledge - 83 Citações

Scopus - 103 Citações

Outras Informações

ID Authenticus: P-00A-368

DOI: 10.1016/j.ijsolstr.2014.03.038

Abstract (EN): A new three-dimensional failure criteria for fibre-reinforced composite materials based on structural tensors is presented. The transverse and the longitudinal failure mechanisms are formulated considering different criteria: for the transverse failure mechanisms, the proposed three-dimensional invariant-based criterion is formulated directly from invariant theory. Regarding the criteria for longitudinal failure, tensile fracture in the fibre direction is predicted using a noninteracting maximum allowable strain criterion. Longitudinal compressive failure is predicted using a three-dimensional kinking model based on the invariant failure criteria formulated for transverse fracture. The proposed kinking model is able to account for the nonlinear shear response typically observed in fibre-reinforced polymers. For validation, the failure envelopes for several fibre-reinforced polymers under different stress states are generated and compared with the test data available in the literature. For more complex three-dimensional stress states, where the test data available shows large scatter or is not available at all, a computational micro-mechanics framework is used to validate the failure criteria. It is observed that, in the case of the IM7/8552 carbon fibre-reinforced polymer, the effect of the nonlinear shear behaviour in the failure loci is negligible. In general, the failure predictions were in good agreement with previous three-dimensional failure criteria and experimental data. The computational micro-mechanics framework is shown to be a very useful tool to validate failure criteria under complex three-dimensional stress states.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16