摘要
为分析层联衬经斜纹机织预制体的细观结构,通过X射线显微镜(Micro-CT)观测复合材料中的纤维,基于Micro-CT观测的纤维横截面形状和空间走向,提出矩形衬经纱横截面、矩形接结经纱横截面、凸透镜形纬纱横截面、直线型衬经纱路径、直线型纬纱路径和抛物线形接结经纱路径等假设,推导了纤维预制体厚度和纤维体积含量与纤维参数之间的关系,建立了预制体细观结构模型,通过纤维宽度和厚度计算纱线横截面变异系数、预制体厚度和纤维体积含量。为验证模型的准确性,以芳纶纤维和超高分子质量聚乙烯纤维为原材料制备了2种相同结构、不同纤维的层联衬经斜纹机织复合材料,并与提出的预制体模型对比分析。结果表明:理论值与实测值在合理误差范围之内,预制体厚度误差小于1.5%,预制体纤维体积含量误差小于1.5%。
In order to analyze the meso-structure of the laminated lining twill woven prefabrication,the yarn profile and direction of the composite materials were observed using Micro-CT.Based on the observation results of MicroCT,the assumptions of rectangular liner warp cross section,rectangular jointed warp cross section,convex lens weft cross section,linear liner warp path,linear weft path and parabolic jointed warp path were put forward.The relationship between the thickness and fiber volume content of the prefabrication and fiber parameters was deduced,and the meso-structure model of the prefabrication was established.The variation of yarn cross-section variation coefficient,prefabrication thickness and fiber volume content were calculated by yarn width and thickness.In order to verify the accuracy of the model,two kinds of interlayer warp twill woven composites with the same structure and different fibers were prepared using aramid fiber and UHMWPE fiber as raw materials,and compared with the proposed prefabrication model.The results show that the theoretical and measured values are within the reasonable error range,the thickness error of the prefabrication is less than 1.5%,and the fiber volume error of the prefabrication is less than 1.5%.
作者
陈利
俞成童
王静
张长龙
周庆
CHEN Li;YU Chengtong;WANG Jing;ZHANG Changlong;ZHOU Qing(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Key Laboratory of Advanced Textile Composites of Ministry of Education,Tiangong University,Tianjin300387,China;Beijing Protech New Material Science Co.,Ltd.,Beijing 102200,China)
出处
《天津工业大学学报》
CAS
北大核心
2024年第1期28-34,共7页
Journal of Tiangong University
基金
天津市自然科学基金资助项目(19JCYBJC18300)。
关键词
层联衬经斜纹机织预制体
细观结构
预制体厚度
预制体纤维体积含量
Micro-CT技术
laminated interleaved twill woven prefabrication
meso-structure
thickness of prefabrication
fiber volume content of prefabrication
Micro-CT technology
