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

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Camanho, PP (Author) FEUP; Arteiro, A (Author) Other; Melro, AR (Author) Other; Catalanotti, G (Author) Other; Vogler, M (Author) Other

Journal

Title: International Journal of Solids and Structures

Vol. 55

Pages: 92-107

ISSN: 0020-7683

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 83 Citations

Scopus - 103 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16