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 Micro-CT,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％.
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
Key words
laminated interleaved twill woven prefabrication/meso-structure/thickness of prefabrication/fiber volume content of prefabrication/Micro-CT technology
维普
万方数据