期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 56, 期 -, 页码 150-160出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2013.10.004
关键词
3-Dimensional reinforcement; Mechanical properties; Numerical analysis; Resin flow
资金
- Engineering and Physical Sciences Research Council [EP/IO33513/1]
- EPSRC Centre for Innovative Manufacturing in Composites
- Airbus UK
- EPSRC [EP/I033513/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I033513/1] Funding Source: researchfish
For a 3D orthogonal carbon fibre weave, geometrical parameters characterising the unit cell were quantified using micro-Computed Tomography and image analysis. Novel procedures for generation of unit cell models, reflecting systematic local variations in yarn paths and yarn cross-sections, and discretisation into voxels for numerical analysis were implemented in TexGen. Resin flow during reinforcement impregnation was simulated using Computational Fluid Dynamics to predict the in-plane permeability. With increasing degree of local refinement of the geometrical models, agreement of the predicted permeabilities with experimental data improved significantly. A significant effect of the binder configuration at the fabric surfaces on the permeability was observed. In-plane tensile properties of composites predicted using mechanical finite element analysis showed good quantitative agreement with experimental results. Accurate modelling of the fabric surface layers predicted a reduction of the composite strength, particularly in the direction of yarns with crimp caused by compression at binder cross-over points. (C) 2013 Elsevier Ltd. All rights reserved.
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