3D geometric modelling of discontinuous fibre composites using a force-directed algorithm
| Autor: | R. Luchoo, L.T. Harper, C.C. Qian, Nicholas A. Warrior |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Mechanical Engineering Young's modulus 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Finite element method 0104 chemical sciences symbols.namesake Geometric design Volume (thermodynamics) Discontinuous composite finite element analysis force-directed algorithm Mechanics of Materials Ultimate tensile strength Materials Chemistry Ceramics and Composites symbols Thin shells Composite material 0210 nano-technology |
| ISSN: | 0021-9983 1530-793X |
| Popis: | A geometrical modelling scheme is presented to produce representative architectures for discontinuous fibre composites, enabling downstream modelling of mechanical properties. The model generates realistic random fibre architectures containing high filament count bundles (>3k) and high (∼50%) fibre volume fractions. Fibre bundles are modelled as thin shells using a multidimensional modelling strategy, in which fibre bundles are distributed and compacted to simulate pressure being applied from a matched mould tool. Finite element simulations are performed to benchmark the in-plane mechanical properties obtained from the numerical model against experimental data, with a detailed study presented to evaluate the tensile properties at various fibre volume fractions and specimen thicknesses. Tensile modulus predictions are in close agreement (less than 5% error) with experimental data at volume fractions below 45%. Ultimate tensile strength predictions are within 4.2% of the experimental data at volume fractions between 40 and 55%. This is a significant improvement over existing 2D modelling approaches, as the current model offers increased levels of fidelity, capturing dominant failure mechanisms and the influence of out-of-plane fibres. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|