棕榈叶鞘纤维的拉伸性能Tensile strength and deformation of palm leaf sheath fiber
郭敏,张同华,程岚,李佳丽
摘要(Abstract)：
研究了棕榈叶鞘纤维(棕榈纤维)在4种不同隔距和准静态条件下的拉伸力学行为,应用SEM观察并分析了纤维断裂面的结构,揭示了纤维断裂的机制.结果表明,棕榈纤维的力学指标具有分散性,强度和伸长率随拉伸隔距的增大而变小,而杨氏模量则呈相反趋势.由于棕榈纤维的结构特殊,强度和模量整体呈现随纤维直径增大而变小的特点.在拉伸过程中,微纤丝取向的改变导致了纤维应力应变曲线中的非线性部分变化,断裂面结构展现了受力时4个纤维细胞的变化过程,解释了纤维的断裂机制.
关键词(KeyWords)： 棕榈叶鞘纤维(棕榈纤维);拉伸强度;微纤丝角;断裂面
基金项目(Foundation): 中央高校基本科研业务费专项资金资助(XDJK2013A021;XDJK2012D008)
作者(Author): 郭敏,张同华,程岚,李佳丽
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