基于渐进均匀化方法的CFRP缠绕储氢气瓶多尺度仿真研究  

Multiscale numerical study of CFRP winding hydrogen storage cylinder based on asymptotic homogenization method

作　　者：冯君[1] 张楠 宋梅利[2] 陈杨[2] 赵晓冬 梁建国 FENG Jun;ZHANG Nan;SONG Meili;CHEN Yang;ZHAO Xiaodong;LIANG Jianguo(National Key Laboratory of Transit Physics,Nanjing University of Science&Technology,Nanjing 210094,China;School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210094,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]南京理工大学机械工程学院,南京210094 [3]太原理工大学机械与运载工程学院,太原030024

出　　处：《复合材料科学与工程》2024年第1期66-73,共8页Composites Science and Engineering

基　　金：山西省科技重大专项项目(20201102003);国家自然科学基金项目(52075361);山西省重点研发计划项目(201903D421030)。

摘　　要：为模拟储氢气瓶的碳纤维复合材料(CFRP)缠绕层复杂结构及应力状态,建立介观尺度CFRP缠绕层代表体积单元(RVE),基于渐进均匀化方法求解均质化复合材料的等效材料参数。通过仿真CFRP层合板拉伸试验,验证渐进均匀化方法和宏观等效材料参数的正确性。基于网格理论确定储氢气瓶缠绕层,细观建模内衬相邻环向缠绕层,RVE模拟其余复合材料层,可准确预测气瓶响应。多尺度模拟70 MPa公称压力作用下三种CFRP缠绕层叠顺序结构的Ⅳ型储氢气瓶响应,结果表明:复合材料均质化模型与细观模型相比,复合材料层纤维方向应力的最大误差为8.7%,内衬等效应力最大误差为2%;交替缠绕次数越少,均质化模型误差越小。先螺旋后环向的缠绕方式或可将复合材料气瓶破裂压提高约15%。In order to simulate the complex structure and stress state of carbon fiber reinforced polymer(CFRP)wound layer in hydrogen storage cylinder,representative volume element(RVE)of composite layer was modeled,and the effective stiffness matrix of RVE was obtained based on the asymptotic homogenization(AH).The correctness of AH and the macroscopic effective parameters of simulated CFRP laminates is verified by tensile test.The parameters of winding layer were determined based on the grid theory,and the hoop winding layers adjacent to the lining were modeled microscopically,while the rest is seen as an RVE.Accordingly,the response of cylinder can be accurately predicted.The response of typeⅣcylinder with three CFRP winding modes under 70 MPa nominal pressure was studied by multiscale modeling.The results show that compared with the mesoscopic model,the maximum error of the fiber direction stress of the composite layer is 8.7%,and the maximum error of the Von-Mises stress of the lining is 2%,and the less the number of alternate winding,the smaller the error of the homogenized model is.The lay-up winding with separated hoop and helical layers may improve the burst pressure by 15%approximately.

关 键 词：复合材料储氢气瓶 渐进均匀化 网格理论 螺旋缠绕 应力分布 

分 类 号：TB332[一般工业技术—材料科学与工程]