考虑纤维缠绕形态的复合材料结构拉伸承载行为  

Tensile bearing behavior of composite structures considering filament wound morphology

作　　者：肖磊[1,2] 胡海晓 曹东风 雷伟华 冀涛[5] 李书欣 XIAO Lei;HU Haixiao;CAO Dongfeng;LEI Weihua;JI Tao;LI Shuxin(Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics,Wuhan University of Technology,Wuhan 430070,China;Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory,Foshan 528000,China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;Institute of Advanced Materials and Manufacturing Technology,Wuhan University of Technology,Wuhan 430070,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学新材料力学理论与应用湖北省重点实验室,武汉430070 [2]先进能源科学与技术广东省实验室佛山分中心(佛山仙湖实验室),佛山528000 [3]武汉理工大学材料复合新技术国家重点实验室,武汉430070 [4]武汉理工大学先进材料制作装备与技术研究院,武汉430070 [5]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《复合材料学报》2023年第2期1167-1178,共12页Acta Materiae Compositae Sinica

基　　金：先进能源科学与技术广东省实验室佛山分中心(佛山仙湖实验室)开放基金(XHT2020-002);中央高校基本科研业务费专项(2020Ⅲ028GX,2021III015JC,WUT2021IVA068)。

摘　　要：纤维缠绕复合材料的纤维束具有交叉起伏形态特征,该形态对复合材料结构的力学行为有显著的影响。本文采用数值仿真和实验手段研究了纤维缠绕复合材料平板结构的拉伸力学行为。实验方面,开展纤维缠绕复合材料平板的准静态拉伸实验,通过数字图像相关技术(DIC)监测其表面应变场的演化过程,研究交叉起伏特征对载荷-位移曲线和应变分布特征的影响;数值分析方面,构建包含纤维缠绕形态的介观有限元模型,基于3D Hashin失效准则开展渐进损伤过程模拟,并引入了复合材料的剪切非线性行为。选取层合板结构为参照组,同时开展实验和数值分析。实验结果表明:对于层合结构,缠绕结构的整体刚度更低,失效位移更大,失效载荷基本相同,且缠绕结构菱形特征单元中部纤维交叉起伏区域存在明显的应变集中现象。所构建的有限元模型和实验结果吻合较好,呈现出纤维起伏区域的应变集中、失效起始和扩展行为。Fiber bundles of filament wound structure have the morphology characteristic of crossover and undulation,which has significant impact on the mechanical behavior of composite structures.In this research,the tensile mechanical behavior of filament wound composite plate was investigated by numerical and experimental methods.In experimental study,quasi-static tensile experiment of fiber-wound composite plate was carried out,and the evolutions of surface strain field were recorded by digital imaging correlation(DIC).The influences of crossover and fluctuation characteristics on the load-displacement curve and strain distribution were investigated.For the numerical analysis,a meso-scale finite element model was created based on the filament wound morphology.The progressive failure process was simulated based on 3D Hashin failure criterion,and the nonlinear shearing behavior of composites was also involved.The experimental and numerical studies of laminated structures were also carried out as the reference group.The experimental results indicate that,compared with the laminated structures,the filament wound structure gives a lower stiffness,a larger failure displacement,and almost a same failure load.An obvious strain concentration is observed in the fiber crossover and undulating region which locates at the middle area of the filament wound rhombus unit.The finite element analysis results are in good agreement with the experimental ones.The strain concentration in the fiber fluctuation region,as well as the failure initiation and propagation behaviors,are represented properly by the numerical analysis.

关 键 词：纤维缠绕复合材料 交叉起伏 数字图像相关 剪切非线性 应变集中 

分 类 号：TB330.1[一般工业技术—材料科学与工程]