| 摘要: |
| 麦秸秆纤维作为一种重要生物质资源已被广泛应用于热塑性复合材料中。纤维在复合材料中的分散性是影响复合材料力学性能的重要因素之一，而目前对其定量化的描述和分析方法仍存在一定不足。本研究基于实验获得的纤维尺寸的统计分布规律，利用随机生成算法模拟纤维在复合材料中的分布；构建描述纤维分散性的指标：分散度，单个纤维数和接触纤维数；统计分析纤维含量、纤维大小对分散性指标影响。结果表明单个纤维数随纤维含量增加而增加，但其增量随纤维含量的增加而降低，降低规律符合三次函数。纤维接触数随纤维含量增加, 增加规律符合二次函数，亦符合理论估计。纤维大小影响单个纤维数和接触纤维数的增加幅度，但不影响单个纤维数的百分比。分散度随纤维含量的增加呈线性下降规律。纤维分散性的定量化描述为进一步的复合材料性能分析和建模提供了量化指标。 |
| 关键词: 麦秸秆纤维 复合材料 分散性 单个纤维数 接触纤维数 分散度 |
| DOI：10.14188/j.ajsh.2020.01.015 |
| 分类号:Q81 |
| 基金项目:江苏省2019年“双创计划”科技副总项目（FZ20190080）, 扬州大学广陵学院自然科学研究项目（ZKZD18004） |
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| The description model of fiber dispersion for wheat straw high density polyethylene (HDPE) composites |
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LU Xiang’an1,2,DAI Yifan2,CHEN Jishuang2
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1.Guangling College of Yangzhou University, Yangzhou, 225000, Jiangsu, China;2.College of Biotechnology and Pharmaceutical Engineering， Nanjing Tech University， Nanjing 211816， Jiangsu, China
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| Abstract: |
| Wheat straw fiber is one of the most abundant natural fibers that can be used effectively in thermoplastic composites. The dispersion of fibers in composites is an important factor affecting the corresponding mechanical properties. There have been a few studies involving statistical approaches for description of fiber dispersion in composites. Based on statistical distribution rule of fiber size, random algorithm is used to stimulate dispersion of fibers in composites. Three indexes are constructed to describe the dispersion of fibers, namely, fiber dispersion properties, single fiber and contacted fiber. The effects of fiber content and fiber size to dispersion are counted and analyzed. The results show that when fiber content increases, the number of single fiber increases, but the increment of single fiber decreases. The decrease law accords with cubic function. The number of fiber contact increases with fiber content, which conforms to quadratic function. The fiber size affects single fiber number and contacted fiber increasing amplitude, but does not affect the percentage of single fiber. The dispersion decreases linearly with the increase of fiber content. Quantitative description of fiber dispersion provides quantitative indicators for further composite performance analysis and modeling. |
| Key words: wheat straw fiber composite dispersion single fiber number contact fiber number dispersion property |
