基于图像处理的纤维分布与取向分布对水泥基材料弯曲性能的影响

发布时间：2018-10-23 17:40

【摘要】：聚乙烯醇(PVA)纤维增强水泥基材料的弯曲性能与纤维在水泥基体内的分布和取向分布相关。采用抛光断面后涂荧光粉的显微成像法,基于图像处理程序对PVA纤维在水泥基材料中的分布和取向分布进行量化测定,对不同基体结构特征影响纤维分布的机理进行了讨论。结合弯曲试验结果,研究了纤维分布和取向分布对材料弯曲性能的影响。纤维分布测定结果表明,均匀的基体结构特征利于纤维的分布,同时对于材料组分和加工制作过程完全相同的试件,纤维分布系数越大,试件的弯曲强度与韧性越大;纤维取向分布测定结果表明,乱向分布的纤维当其长度方向与抛光断面方向的角度接近90°分布概率越大,试件的弯曲韧性也越大。
[Abstract]:The flexural properties of polyvinyl alcohol (PVA) fiber reinforced cement-based materials are related to the distribution and orientation distribution of the fibers in the cement matrix. The distribution and orientation distribution of PVA fiber in cement based on image processing program were quantitatively measured by means of microscopic imaging of polished cross-section phosphor powder. The mechanism of different matrix structure characteristics affecting fiber distribution was discussed. The effects of fiber distribution and orientation distribution on the bending properties of the materials were studied. The results of fiber distribution measurement show that the uniform matrix structure is beneficial to the fiber distribution, and the larger the fiber distribution coefficient is, the greater the bending strength and toughness of the specimens are. The results show that the larger the probability of fiber orientation distribution is when the angle between the length direction and the polished section direction is close to 90 掳, the greater the bending toughness of the specimen is.
【作者单位】：内蒙古工业大学信息工程学院;内蒙古建筑职业技术学院建筑工程学院;内蒙古工业大学理学院;内蒙古工业大学土木工程学院;
【基金】：国家自然科学基金(11362013) 内蒙古自治区高等学校科学研究项目(NJZY330) 内蒙古工业大学科学研究项目(X201423)
【分类号】：TU528.58

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