2.5维机织复合材料TCM细观分胞模型研究  

Study on Ternary-Cell Model for 2.5 Dimensional Woven Composites

作　　者：刘浩龙 温卫东[2] 崔海涛[2] 张宏建[2] LIU Haolong;WEN Weidong;CUI Haitao;ZHANG Hongjian(Shanghai Aircraft Design and Research Institute,Shanghai 201210,China;Nanjing University of Aeronautics and Astronautics,College of Energy&Power Engineering,Jiangsu Nanjing 210016,China)

机构地区：[1]上海飞机设计研究院,上海201210 [2]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械设计与制造》2024年第12期173-177,共5页Machinery Design & Manufacture

摘　　要：从真实反映制造工艺对2.5维机织复合材料厚度方向上纱线束截面尺寸的影响出发,在传统二元分胞模型基础上提出了一种新的胞体—过渡胞,进而在细观尺度上建立了2.5维机织复合材料三胞体模型(TCM)。该模型反映了不同厚度位置经纱几何参数的差异,弥补了传统分胞方法的不足。基于TCM和刚度体积平均方法预测了几种典型2.5维机织复合材料包括弹性模量在内的力学性能,并与实验结果进行了对比。分析结果表明,基于TCM的预测结果相比传统模型预测精度更高;另外,经向弹性模量在厚度方向上呈现“马鞍”形分布;对10-6w材料,过渡单胞和内层单胞的经向弹性模量相差约6%,而传统分胞方法无法准确反映材料表层/次外层和内层材料结构及力学性能的差异。For the purpose of taking the impact of manufacturing procedure on the cross-section of fiber bundles along thickness direction into account,a Ternary-Cell microscopic mode(l TCM)for 2.5 dimensiona(l 2.5-D)woven composites was proposed by introducing a new type of RVE(transition cell)into traditional cell partition method.Compared with conventional models,the ternary cell model is capable of capturing the differences of geometrical parameters of surficial,sub-surficial,and internal fiber yarns.Moreover,mechanical parameters including Moduli of several types of typical 2.5-D woven composites were predicted based on TCM as well as stiffness matrix average method.The results showed that the predictions agreed well with experimental data;in addition,a characteristic“saddle-shape”curve was observed for longitudinal tensile modulus along thickness direction;and for 10-6w,the comparative error of longitudinal tensile stiffness between surface cell,transition cell,and inner cell was around 6%,which indicated the deficiency of traditional cell partition method.

关 键 词：2.5维机织复合材料 单胞划分方法 三胞体模型 刚度预测 

分 类 号：TH16[机械工程—机械制造及自动化] TB332[一般工业技术—材料科学与工程]