摘要
建立了确定显微计算机断层扫描技术(Micro-CT)扫描最合适分辨率的方法,并基于CT图像分析了3K五枚缎纹织物的结构,预测了渗透率。首先,将织物理想单胞模型转换为不同分辨率二维切片,考察分辨率对单胞结构、渗透率表征的影响,提出了确定Micro-CT扫描最合适分辨率的方法;其次,采用确定的分辨率对织物进行Micro-CT扫描,获取织物细观结构;最后,使用CT三维细观结构进行厚度方向渗透率数值预测,研究了织物结构的空间离散性对厚度方向渗透率的影响。结果表明:对于本文所用五枚缎纹织物,采用15μm分辨率进行Micro-CT扫描最合适;通过Micro-CT可准确获取织物纤维束的路径及截面变化;多层织物的孔隙沿3个主方向均呈现周期性排布,且束间孔隙率均值为16.6%;使用真实CT模型的厚度方向渗透率预测结果与实验值具有良好的吻合性。
The optimal resolution determination method of micro-computed tomography(Micro-CT)scanning was presented here based on two-dimensional slices at different resolutions for ideal unit cell model,and the mesostructure and permeability of 3K 5-harness satin woven fabric were characterized based on the CT image at the optimal resolution.Firstly,the ideal unit cell model of the fabric was converted into 2D slices at different resolutions and the effects of resolution on the characterization of cell structure and permeability were investigated.Thereafter,the optimal resolution was determined for fabric CT scanning.Then,the CT image of the fabric with the optimal resolution was used for the meso-structure and through-thickness permeability characterizations of the fabric.The results show that the optimal resolution for the CT scanning of 5-harness satin woven fabric is 15μm.The path and cross-sectional variation of the yarns in the fabric can be obtained by Micro-CT accurately.The intertow voids of the multilayer fabric are arranged periodically along the three main directions with an average intertow porosity of 16.6%.The through-thickness permeabilities obtained based on Micro-CT are in good agreement with experimental results.
作者
曹鹏军
赵文斌
杨斌
倪爱清
王继辉
CAO Pengjun;ZHAO Wenbin;YANG Bin;NI Aiqing;WANG Jihui(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Xi'an Aerospace Composites Research Institute,Xi'an 710025,China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2023年第3期1751-1763,共13页
Acta Materiae Compositae Sinica
基金
科工局基础科研项目(JCKY2018207B204)。
关键词
缎纹织物
分辨率
CT图像
束间孔隙
数值模拟
渗透率
satin fabric
resolution
CT image
inter-tow voids
numerical simulation
permeability
