基于FEM的编织角对碳纤维圆管拉伸性能影响研究  

Effect of braiding angle on tensile properties of carbon fiber circular tube based on FEM

作　　者：李德宝[1] 朱锐祥 祖磊 陈世军 张骞 张桂明 吴乔国 LI De-bao;ZHU Rui-xiang;ZU Lei;CHEN Shi-jun;ZHANG Qian;ZHANG Gui-ming;WU Qiao-guo(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China;College of Civil Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009 [2]合肥工业大学土木与水利工程学院,合肥230009

出　　处：《复合材料科学与工程》2022年第9期28-34,共7页Composites Science and Engineering

基　　金：国家自然科学基金项目(51875159,52175311,52175133,12102115);安徽省重点研究与开发计划项目(201904d07020013);中央高校基本科研业务费专项资金资助(JZ2021HGQB0274)。

摘　　要：本文在细观力学的基础上,建立有限元模型,以预测编织单胞的拉伸模量。首先,采用参数化建模建立二维三轴编织结构模型,并与实际样件比较,研究了编织角对编织圆管单层厚度和纤维含量的影响。结果表明,在同种建模方法下,随着编织角度逐渐增大,纤维体积含量呈现先增后趋于稳定的趋势,单层厚度出现变薄的现象,且纤维挤压堆积得以减轻。然后,通过有限元模拟,预测出单胞的应力应变和模量值;经对比,该预测结果与实验结果吻合。最后,采用东丽T700碳纤维和环氧树脂编织成二维三轴圆管,根据GB/5349标准进行了复合材料二维三轴编织圆管的轴向拉伸实验,研究了不同编织角度对二维三轴编织复合材料圆管轴向拉伸性能的影响,以及编织角度对模量的影响;结果表明编织角度越小,模量越高,轴向拉伸性能越好。In this paper,a finite element model was established based on meso-mechanics to predict the tensile modulus of braided RVE.Firstly,a two-dimensional triaxial braided structure model was established by parametric modeling,and the effect of braided angle on the thickness and fiber content of braided circular tube was studied by comparing with the actual sample.The results show that with the same modeling method,as the braiding angle increases,the fiber volume content increases first to a certain level and then remains steady at the level.When the monolayer thickness becomes thinner,and the fiber extrusion and accumulation is reduced.Then,the stress,strain and modulus of representative volume element were predicted by finite element simulation.The predicted results are in good agreement with the experimental results.Finally,TORAY T700 carbon fiber and epoxy resin were used to braided 2 D triaxial tube.According to GB/5349 standard,the axial tensile test of 2 D triaxial braided tube was carried out in order to study the effects of different braided angles on the axial tensile properties of 2 D triaxial braided tube and those of braided angles on the modulus.The results suggest that the smaller the braiding angle,the higher the modulus and the better the axial tensile property.

关 键 词：编织圆管 拉伸实验 编织角度 拉伸模量 

分 类 号：TB332[一般工业技术—材料科学与工程]