基于Micro-CT技术的3D机织预制件细观结构分析  

Analysis of meso-structure of 3D woven preforms based on the micro-CT technology

作　　者：邵梦洁 谢军波 杨志 焦伟 郭珍珍 陈利[1,2] 杜雪菲[3] SHAO Mengjie;XIE Junbo;YANG Zhi;JIAO Wei;GUO Zhenzhen;CHEN Li;DU Xuefei(Ministry of Education Key Laboratory of Advanced Textile Composite Materials,Institute of Composite Materials,Tiangong University,Tianjin 300387,China;School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Aerospace Research Institute of Materials and Processing Technology,Beijing 100076,China)

机构地区：[1]天津工业大学复合材料研究院纺织复合材料教育部重点试验室,天津300387 [2]天津工业大学纺织科学与工程学院,天津300387 [3]航天材料及工艺研究所,北京100076

出　　处：《复合材料学报》2022年第8期4129-4138,共10页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金青年基金(11802204);天津市自然科学基金青年基金(18JCQNJC73000);天津市教委科研计划项目(2018KJ195);天津市高等学校创新团队项目(TD13-5043)。

摘　　要：基于微计算机断层扫描(Micro-CT)技术重构了纤维预制件的3D细观结构,提出了两个表征纤维预制件几何结构变形的量化指标,研究了纬纱密度和厚度对3D机织预制件细观结构的影响机制。结果表明:Micro-CT技术能够有效表征3D机织预制件内部纱线的截面形态和空间路径;当纬纱密度为2.0根/cm时,预制件试样均表现出明显的变形,不适合实际工程应用;随着纬纱密度的增加,纤维预制件的内部结构趋于稳定;10 mm试样的内部结构比5 mm试样更稳定,但表面纱线的横截面和路径仍然呈现较大的变形。The 3D meso-structures of the fiber preforms was reconstructed based on the micro-computed tomography(micro-CT)technology,two quantitative indexes were proposed to characterize the deformation of the fiber preforms'geometric structure.The influence mechanism of weft densities and thicknesses on the meso-structure of the 3D woven preform was studied.The results show that the micro-CT technology can be used to characterize the cross-section and spatial path of the yarns inside the 3D woven preform effectively.The preform samples with the weft density of 2.0 picks/cm show obvious deformation,and thus are not suitable for practical engineering application.With the increase of the weft density,the internal structure of the fiber preform tends to be stable.The internal structures of the 10 mm samples are more stable than that of the 5 mm samples,however,the cross section and path of the surface yarns still show large deformation.

关 键 词：3D机织 预制件 纤维结构 细观变形 Micro-CT技术 

分 类 号：TB333[一般工业技术—材料科学与工程]