纤维集合体压缩力学行为的研究:2.纤维形态及表面摩擦对压缩性能的影响

Research on compressional behavior of fiber assembly:2.influence of fiber morphological structure and surface friction on compressional behavior of fiber assembly

通过单向施力挤压实验,从纤维形态及表面摩擦的角度对羊毛、山羊绒、腈纶、鹅绒、木棉5种常用纤维集合体的压缩性能进行探讨。分析纤维的形态及结构是影响纤维集合体压缩性能的主要因素之一,验证了纤维间接触点数量不受纤维卷曲及纤维截面形状影响这一结论。认为纤维的排列形式对集合体压缩性能会产生重要影响,排列形式不同导致集合体结构不同,产生压缩力的来源也不同。有无筒壁约束条件下的集合体压缩力学行为也存在明显差异,这主要与纤维集合体能否有较大的自由空间发生膨胀与变形有关。

From the viewpoints of fiber morphological structure and surface friction, the compressional behavior of five fiber assemblies has been investigated sequentially by one-way compression, i.e. wool, cashmere, acrylic, goose down and kapok. Fiber morphological structure was one of the main influence factors for the compressional behavior of fiber assemblies. The conclusion that the contact numbers between fibers had nothing to do with the fiber crimp and cross section was verified. Simuhaneouly, the compressibility of fiber assemblies depended on fiber arrangement intensively. Different arrangements led to different assembly structures and different sources of compressing force. In addition, there were distinct discrepancy for the forces compressing on the fiber assemblies in cylinder and without cylinder. It depended on that whether the assemblies could swell and deform freely.