内压下轴编碳/碳复合材料喉衬细观结构与宏观应力状态的关联模型  

Correlation model of meso-scale structure and macro-scale stress state of axle-knitted C/C composites throat insert under internal pressure

作　　者：寇钤芊 张光喜 陈意高 刘苏骅 吴小军[2] 校金友[1] 文立华[1] KOU Qianqian;ZHANG Guangxi;CHEN Yigao;LIU Suhua;WU Xiaojun;XIAO Jinyou;WEN Lihua(School of Astronautics,Northwestern Polytechnical University,Xi'an 710072,China;Xi'an Aerospace Composites Research Institute,Xi'an 710025,China)

机构地区：[1]西北工业大学航天学院,西安710072 [2]西安航天复合材料研究所,西安710025

出　　处：《固体火箭技术》2023年第5期770-778,共9页Journal of Solid Rocket Technology

摘　　要：针对内压作用下的中空轴编C/C复合材料设计问题,提出依据复合材料均匀化理论,将中空结构简化为功能梯度材料圆筒的构想,构建了轴编C/C复合材料细观结构与宏观应力分布的理论关联模型。以中空结构等应力分布为设计目标,采用所建立的关联模型设计获得轴编C/C复合材料的编织工艺方案,并通过有限元仿真验证了方案的正确性。结果表明,建立的关联模型为轴编C/C复合材料喉衬的编织工艺设计提供了理论支撑,通过对碳棒和纤维束排布规律等细观结构的设计,喉衬内外周向应力差减小了24.58%。In response to the design challenge of the hollow axle-knitted C/C composite material under internal pressure,a concept of simplifying the hollow structure into a functionally gradient material cylinder was proposed based on the homogenization theory of composite materials,and the theoretical correlation model of the mesoscopic structure and macroscopic stress distribution of hollow structures of axle-knitted C/C materials was constructed.Using the correlation model,a weaving process plan for the axle-knitted C/C composite was designed with the aim of achieving uniform stress distribution in the hollow structure.The correctness of the plan was verified by finite element simulation.The results show that the established correlation model provides theoretical support for the design of the throat lining of axle knitted C/C composites,and the circumferential stress difference between the inside and outside of the throat insert is reduced by 24.58%through the design of the meso-structure such as the carbon rods and the fiber bundles arrangement pattern.

关 键 词：轴编C/C复合材料 喉衬 中空结构 功能梯度 编织工艺设计 细观-宏观关联模型 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]