Cross-Sectional Area Measurement and Monofilament Strength Test of Kenaf Bast Fibers
Cross-Sectional Area Measurement and Monofilament Strength Test of Kenaf Bast Fibers
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红麻麻纤维的截面积测量和单丝强度测试
DOI：
10.2472/jsms.54.887
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. Funami
中科院分区：
文献类型：
--
作者：
Kohji Suzuki;I. Kimpara;H. Saito;K. Funami
本研究的主要目的是统计表征红麻（Hibiscus cannabinus L.）麻纤维，现在用于纤维增强复合材料。本文是本研究的第一部分，报道了从红麻麻韧皮纤维的同一部位取样进行几何尺寸测量和单丝抗拉强度测试的实验过程和结果。纤维的横截面几何形状，在介观水平上由基本纤维细胞和细胞间材料组成，被发现严重沿着和纤维之间的变化。提出了一种从相互垂直的侧视图估算纤维截面积的方法。观察到纤维的单丝强度的大的变化。在实际应用中，定标距纤维的强度可以用双参数威布尔分布来描述，但不同标距纤维的威布尔形状参数和尺度参数不同，这可能是由于纤维的几何变化和“介观”内部结构所致。
The primary purpose of this study is to statistically characterize the tensile strength of kenaf (Hibiscus cannabi- nus L.) bast fibers, which are now using for fiber-reinforcing composite materials. This paper is the first part of the present study, and reports the experimental procedures and results for geometrical measurements and monofilament tensile strength test of the kenaf bast fibers sampled from the identical portion in an individual plant. Cross-sectional geometries of the fibers, which in the mesoscopic level consist of elementary fibrous cells and inter-cell materials, were found to vary severely along and among fibers. A method to estimate cross-sectional areas of this plant fiber from their mutually-perpendicular side views was also proposed. Large variations of monofilament strength of the fibers were observed. The strength with gauge length fixed was found to be well described by the two-parameter Weibull distribution in practice, but Weibull shape and scale parameters were different from each of different gauge lengths, which may be primary due to the along-and-among geometrical variation and "mesoscopic" internal struc- ture of the fibers.