基于一元二次函数的层联机织预制体细观结构表征  

Microstructure characterization of multi-layer interlocked woven preforms based on quadratic functions

作　　者：任丽冰 陈利[1,2] 焦伟 REN Libing;CHEN Li;JIAO Wei(School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China;Key Laboratory of Advanced Textile Composites Materials, Ministry of Education,Tiangong University, Tianjin 300387, China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300387

出　　处：《纺织学报》2021年第8期76-83,共8页Journal of Textile Research

基　　金：山西省科技重大专项资助项目(20181102022);天津市科技重大专项与工程项目(18ZXJMTG00190);天津市高等学校创新团队培养计划项目(TD13-5043)。

摘　　要：织物预制体结构参数之间的相互关系是高性能复合材料设计需要解决的关键问题。为建立层联机织预制体的细观几何关系,通过显微观察和结构分析提出基于一元二次函数的抛物线凸透镜形纬纱横截面、抛物线形经纱路径等假设,通过研究典型的多层平纹层间联锁结构层联机织预制体,建立预制体全厚度单胞模型,推导其细观结构参数的几何表达,获得纱线横截面变异系数、预制体厚度和纤维体积含量的计算方法,从而实现预制体结构的细观设计。通过实测值和理论预测值的对比,验证了该细观模型的有效性和合理性,并确定了层联机织平纹预制体的纱线填充因子取值区间为0.73~0.87。The relationship between the structural parameters of textile preforms is a key factor to the design of high-performance composite materials.In order to establish the microstructural relationship of the multi-layer interlocked woven preform,the assumptions that the weft cross section is a parabolic biconvex lens and the warp path is a parabolic wave based on the quadratic function were proposed through microscopic observation and structural analysis.The multi-layer interlocked woven preform with the typical layer-to-layer interlocked plain woven structure was studied and a through-thickness cell model was established.Then the relationship between the microstructure parameters was obtained,and the variation coefficient of the yarn cross-section,preform thickness and fiber volume fraction were able to be calculated.Then the microstructure of preforms was designed through above analysis and calculation.The validity and rationality of the microstructural model were verified through the comparison between the experimental data and the theoretical results.The yarn packing factor of the multi-layer interlocked woven preform was confirmed in the range of 0.73 to 0.87.

关 键 词：层联机织预制体 细观结构 结构参数 厚度 纤维体积含量 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]