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Yang, Nenglong
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Publications (4/4 displayed)
- 2025Effect of micro-scale fibre uncertainties on the mechanical behaviour of natural/synthetic hybrid fibre compositescitations
- 2024Intra-yarn fibre hybridisation effect on homogenised elastic properties and micro and meso-stress analysis of 2D woven laminae: Two-scale FE modelcitations
- 2024A two‐scale numerical analysis of intra‐yarn hybrid natural/synthetic woven composites
- 2024A two-scale numerical analysis of intra-yarn hybridnatural/synthetic woven composites
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article
Effect of micro-scale fibre uncertainties on the mechanical behaviour of natural/synthetic hybrid fibre composites
Abstract
This paper investigates how uncertainties in natural/synthetic hybrid fibre composites— specifically fibre distribution, diameter, and elastic properties—affect the lamina properties and micro-stress distributions. Using a representative volume element model and Monte Carlo simulations, the study examines unidirectional flax/E-glass/epoxy and flax/epoxy composite laminae. Flax fibre uncertainties are modelled as normal distributions with a 20% coefficient of variation. Results reveal that these uncertainties minimally influence the homogenised properties of flax/epoxy laminae. However, in flax/E-glass/epoxy laminae, E-glass fibres significantly alter homogenised properties, with fibre elastic properties uncertainties having a greater effect. These uncertainties also influence matrix stress fields in flax/epoxy laminae, primarily due to uncertainties in fibre elastic properties. Although the influence is smaller in flax/E-glass laminae, it remains significant, as hybridisation can increase von Mises stress and potentially cause early resin cracking. This stochastic approach highlights the importance of micro-scale fibre uncertainties for damage analysis despite their limited influence on homogenised properties.