Stress concentrations in an impregnated fibre bundle with random fibre packing

TLDR: In this article, random fiber packings were modelled using 3D finite element analysis and compared to ordered fibre packings, and significant differences in the stress redistribution were found, and the presence of fibres at smaller distances from the broken fibre explains these phenomena.

About: This article is published in Composites Science and Technology.The article was published on 2013-01-24 and is currently open access. It has received 87 citations till now. The article focuses on the topics: Stress concentration.

Figures

Figure 3:

Figure 4: A quarter of the mesh in the broken fibre (at the crack plane): (a) default mesh (b) refined mesh. Both meshes remain the same along the fibre direction.

Table 1: Parameters of the finite element model

Figure 1: Description of the model: (a) Creation of a circular model out of the square RVE, with the broken fibre indicated in black (b) boundary conditions (c) 3D view of the mesh

Figure 2: The longitudinal stress field of an intact glass fibre near a broken glass fibre in the crack plane. The applied strain is 0.1% and fibre volume fraction 70%.

Table 2: Engineering constants of isotropic and transversely isotropic fibres

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In this paper, random fiber packings were modelled using 3D finite element analysis and compared to ordered fibre packings, and significant differences in the stress redistribution were found.