考虑面元转弯纤维横向约束效应的编织复合材料修正模型  

Modified Model of Braided Composites Considering Transverse Restraint Effect of Turning Fibers on Surface Cell

作　　者：马斌捷[1] 徐孝诚[2] 梁吉鹏[1] 周畅 MA Bin-jie;XU Xiao-cheng;LIANG Ji-peng;ZHOU Chang(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;Beijing Institute of Space Long March Vehicle,Beijing 100076,China)

机构地区：[1]北京强度环境研究所,北京100076 [2]北京航天长征飞行器研究所,北京100076

出　　处：《强度与环境》2021年第1期1-9,共9页Structure & Environment Engineering

基　　金：自然科学基金(11502024)。

摘　　要：针对编织复合材料计算模型横向力学性能误差大和强度试验数据缺乏的研究现状,补充了纵横方向的刚度和强度试验数据,基于简单的刚度体积加权模型,考虑面元转弯交叉纤维的横向刚度约束效应,本文引入刚度调整因子——编织致密度,提出了面元刚度横向约束修正模型,纵横刚度和泊松比的计算误差在10%以内;结合层合板Tsai-Hill强度准则的修正模型,其纵横强度的计算误差在20%以内,获得了方法简单、较高精度的理论分析成果。On account of the research status of braided composites,large errors of transverse mechanical properties in calculation model and lacking of strength test data,the stiffness and strength test data in longitudinal and transverse directions are supplemented,based on the simple stiffness volume weighted model,the transverse stiffness constraint effect of turning fibers on surface cell is considered,stiffness adjustment factor-braiding density is introduced in this paper,modified model of the surface cell stiffness with transverse constraint is proposed,and the calculation errors of longitudinal and transverse stiffness and Poisson's ratio are within 10%.Combined with modified model of Tsai-Hill strength criterion,the calculation error of longitudinal and transverse strength is less than 20%,and the theoretical analysis results with simple method and high accuracy are obtained.

关 键 词：编织复合材料 强度 刚度 转弯纤维 横向约束 编织致密度 修正模型 

分 类 号：V415[航空宇航科学与技术—航空宇航推进理论与工程]