Experimental analysis of the planar compaction and preforming of unidirectional flax reinforcements using a thin paper or flax mat as binder for the UD fibers
Experimental analysis of the planar compaction and preforming of unidirectional flax reinforcements using a thin paper or flax mat as binder for the UD fibers
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DOI：
10.1016/j.compositesa.2018.03.036
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
Rodrigue Stéphane Mbakop;G. Lebrun;F. Brouillette
中科院分区：
文献类型：
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作者：
Rodrigue Stéphane Mbakop;G. Lebrun;F. Brouillette
纤维增强材料的横向压实和几何构象对于树脂传递模塑 (RTM) 工艺的复杂干纤维预成型件的生产具有重要意义。这项工作首次研究了两种增强材料的平面压实和预成型，这两种增强材料是由短牛皮纸浆或亚麻纤维薄层固定在一起的对齐亚麻纱线制成的。进行平面压实试验，以评估温度、压力、湿度和钢筋层数对钢筋蠕变百分比、厚度恢复和永久变形的影响。接下来，评估了工艺参数对复杂 3D 预制件质量的影响。看来温度、压力和湿度会增加永久变形，而层数则相反。此外，热湿法制造的预成型件比在其他条件下获得的预成型件具有更好的尺寸稳定性（尺寸和几何形状）。
Transverse compaction and geometric conformation of fiber reinforcements have a significant importance in the production of complex dry fiber preforms for the resin transfer molding (RTM) process. This work investigates for the first time the planar compaction and preforming of two reinforcements made from aligned flax yarns held together by a thin layer of short kraft pulp or flax fibers. Planar compaction tests have been carried out in order to evaluate the influence of temperature, pressure, humidity and number of layers of reinforcement on the creep percentage, thickness recovery and permanent deformation of reinforcements. Next, the effect of process parameters on the quality of a complex 3D preform was evaluated. It appears that temperature, pressure and humidity increase the permanent deformation while the number of layers acts inversely. In addition, hot and wet made preforms have better dimensional stability (dimensions and geometry) than preforms obtained under other conditions.