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• W2469574025 abstract "Keywords: Interface crack, LEBIM, FEM, FFM, UMAT Abstract : This work presents a failure model for interfaces in a fibre-reinforced composite system. The method is based on the Linear Elastic Brittle Interface Model (LEBIM) [1,2] and on a Finite Fracture Mechanics (FFM) [3] approach. The LEBIM and similar models are regularly used to characterize adhesively bonded joints between two solids, where a continuous distribution of linear-elastic springs represents the interface [1,2]. However, sometimes the LEBIM is not able to describe adequately the behaviour of the interface under study, because in this model the interface strength and fracture toughness are related through a restrictive equation. For this reason, the coupled stress and energy criterion of FFM [3] is used in this paper, which allows an independent definition of the interface strength and fracture toughness. Besides, this model its ruled by a law which takes into account the variation of the fracture toughness with the fracture mode mixity of a crack growing along the interface between two solids. The purpose of this paper is to predict the crack onset and propagation assuming this failure criterion by means of the Finite Element Method (FEM) and to compare the obtained results with a previous analysis using the Boundary Element Method (BEM) [4]. This failure criterion is implemented in the commercial FEM code Abaqus using a user subroutine UMAT [5] and Python coding. References: Tavara L., Mantic V., Graciani E., Paris F., BEM analysis of crack onset and propagation along fiber–matrix interface under transverse tension using a linear elastic–brittle interface model, Engineering Analysis with Boundary Elements 35(2011) 207–222. Mantic V., Tavara L., Blazquez A., Graciani E., Paris F., A linear elastic-brittle interface model: application for the onset and propagation of a fibre-matrix interface crack under biaxial transverse. International Journal of Fracture 195(2015) 15-38. Cornetti P., Mantic V., Carpinteri A., Finite Fracture Mechanics at elastic interfaces, International Journal of Solids and Structures 49 (2012) 1022–1032. Munoz-Reja M., Tavara L., Mantic V, Cornetti P., Crack onset and propagation at fibre–matrix elastic interfaces under biaxial loading using finite fracture mechanics, Composites Part A: Applied Science and Manufacturing (in press). Castillo D., Tavara L., Mantic V., Modelling of debond onset and growth in a group of fibres under transverse loads using Abaqus user subroutine UMAT, 16th European Conference on Composite Materials, ECCM 2014." @default.
• W2469574025 created "2016-07-22" @default.
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• W2469574025 date "2016-05-08" @default.
• W2469574025 modified "2023-10-02" @default.
• W2469574025 title "Modelling of fibre-matrix debond onset and growth by Finite Fracture Mechanics at elastic interfaces using Abaqus user subroutine UMAT" @default.
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