非对称夹芯结构低速冲击响应  

Low-velocity Impact Response of Asymmetric Honeycomb Sandwich Structure

作　　者：高春赟 陈启晖 杜瑞奎[1,2] 赵贵哲 贺星[1,2] Gao Chunyun;Chen Qihui;Du Ruikui;Zhao Guizhe;He Xing(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;Research Center for Engineering Technology of Polymeric Composites of Shanxi Province,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051 [2]山西省高分子复合材料工程技术研究中心,太原030051

出　　处：《工程塑料应用》2023年第3期113-120,共8页Engineering Plastics Application

基　　金：山西省高性能碳纤维及其复合材料研制和应用重点科技创新平台项目;山西省基础研究计划资助项目(20210302123035)。

摘　　要：为研究非对称夹芯结构的低速冲击响应,以环氧树脂/碳纤维复合材料层合板为面板,以Nomex蜂窝为芯材制备蜂窝夹芯板,通过落锤冲击试验研究了不同上下面板厚度比对夹芯结构抗低速冲击性能的影响。同时,基于Hashin失效准则、渐进损伤模型、内聚力模型、理想弹塑性模型,在有限元仿真软件ABAQUS中建立了碳纤维增强树脂基复合材料(CFRP)面板/Nomex蜂窝夹芯板精细化低速冲击仿真模型,仿真结果与试验结果吻合较好。结果表明,当上下面板总厚度不变时,增大上下面板的厚度比,有助于提高夹芯结构的抗低速冲击性能,且建立的有限元模型可以有效地预测蜂窝夹芯板的低速冲击响应和冲击损伤。通过提出的仿真模型,观察并讨论了低速冲击响应下的结构内部损伤及演化过程。To study the low-velocity impact behavior of the asymmetric sandwich panel with carbon fiber/epoxy composites facesheets and Nomex honeycomb core,this paper presents the effects of different thickness ratios of top to bottom facesheets on the low-velocity impact resistance of sandwich structures with the hemisphere-head drop hammer impact test system.In addition,based on Hashin damage criteria,continuous damage mechanics models,cohesive element models and a refined low-velocity impact simulation model for honeycomb sandwich plate with carbon fiber reinforced polymer(CFRP)facesheets,adhesive films,hexagonal Nomex honeycomb core was established by finite element simulation software ABAQUS.The simulation results agree well with the experimental counterparts.The studies reveal that the low-velocity impact resistance of the sandwich structure can be effectively improved by increasing the thickness ratio of top to bottom facesheets when the total thickness remains the same.The established model can be used to predict the low-velocity impact response and impact damage effectively.More detailed responses,such as internal damage and evolution are discussed with the numerical model proposed.

关 键 词：复合材料 蜂窝夹芯板 低速冲击 有限元仿真 

分 类 号：TB332[一般工业技术—材料科学与工程]