Gnaba Imen, Wang Peng, Soulat Damien, Omrani Fatma, Ferreira Manuela, Vroman Philippe
GEMTEX, ENSAIT, University of Lille, F-59056 Roubaix, France.
Composites Centre, AMRC with Boeing, University of Sheffield, Sheffield S60 5ZT, UK.
Materials (Basel). 2019 Aug 11;12(16):2560. doi: 10.3390/ma12162560.
To date, nonwoven fabrics made with natural fibres and thermoplastic commingled fibres have been extensively used in the composite industry for a wide variety of applications. This paper presents an innovative study about the effect of the manufacturing parameters on the mechanical behaviour of flax/PP nonwoven reinforced composites. The mechanical properties of nonwoven fabric reinforced composites are related directly to the ones of dry nonwoven reinforcements, which depend strongly on the nonwoven manufacturing parameters, such as the needle-punching and areal densities. Consequently, the influence of these manufacturing parameters will be analysed through the tensile and flexural properties. The results demonstrated that the more areal density the nonwoven fabric has, the more the mechanical behaviour can be tested for composites. By contrast, it has a complex influence on needle-punching density on the load-strain and bending behaviours at the composite scale.
迄今为止，由天然纤维和热塑性混合纤维制成的非织造织物已在复合材料行业中广泛用于各种应用。本文提出了一项关于制造参数对亚麻/聚丙烯非织造增强复合材料力学行为影响的创新性研究。非织造织物增强复合材料的力学性能直接与干非织造增强材料的力学性能相关，而干非织造增强材料的力学性能在很大程度上取决于非织造制造参数，如针刺密度和面密度。因此，将通过拉伸和弯曲性能来分析这些制造参数的影响。结果表明，非织造织物的面密度越大，复合材料的力学行为就越能得到测试。相比之下，针刺密度对复合材料尺度下的载荷-应变和弯曲行为具有复杂的影响。
