Saturated out-of-plane permeability and deformation metrology of textiles at high levels of injection pressure
Out-of-plane impregnation and high levels of injection pressure are key strategies for cycle time reduction in Liquid Composite Molding processes. The combination of these two strategies provides a promising approach for large volume production of automotive components. In this context, a novel test...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-04-01
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| Series: | Advanced Manufacturing: Polymer & Composites Science |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/20550340.2022.2064070 |
| Summary: | Out-of-plane impregnation and high levels of injection pressure are key strategies for cycle time reduction in Liquid Composite Molding processes. The combination of these two strategies provides a promising approach for large volume production of automotive components. In this context, a novel test system is presented, which allows the textile reaction characterization to saturated out-of-plane fluid flow at injection pressure levels of up to 200 bar. For any given engineering textile, the resulting out-of-plane permeability and total hydrodynamic compaction can be measured for different combinations of initial fiber volume content, number of layers and injection pressure. Initial tests on a conventional non-crimp fabric show a compaction-induced out-of-plane permeability decrease for pressure levels up to 95 bar, while for pressure levels between 95 and 170 bar the permeability remains constant. In other words above 95 bar, a further increase in pressure directly pays off in terms of increased flow rate. The identification of such processing windows can be very valuable for process design. |
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| ISSN: | 2055-0340 2055-0359 |