基于内聚力模型的复合材料裂纹扩展研究  

Research on crack propagation of composite materials based on cohesive zone model

作　　者：何振鹏 邓殿凯 刘国峰 孙爱俊 钱俊泽 黎柏春 胡艺馨 杨帆 HE Zhen-peng;DENG Dian-kai;LIU Guo-feng;SUN Ai-jun;QIAN Jun-ze;LI Bai-chun;HU Yi-xin;YANG Fan(Aeronautical Engineering Institute,Civil Aviation University of China,Tianjin 300300,China;Engineering Training Centre,Civil Aviation University of China,Tianjin 300300,China;Shenyang Maintenance Base China Southern Airlines Co,Ltd,Shenyang 110000,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]中国民航大学工程训练中心,天津300300 [3]中国南方航空股份有限公司沈阳维修基地,沈阳110000

出　　处：《复合材料科学与工程》2022年第1期5-12,共8页Composites Science and Engineering

基　　金：天津市自然科学基金项目(18JCQNJC05400);天津市教委自然科学项目(2018KJ240);中央高校基金(3122019075);实验技术创新基金项目(2020CXJJ57)。

摘　　要：在内聚力本构模型的基础上发展了三维零厚度内聚力单元的数值计算方法,结合有限单元理论推导双线性内聚力模型和基于势能的内聚力模型的有限元格式,通过运用ABAQUS-UEL用户单元子程序模块开发了一种三维八节点的内聚力单元,与实际的复合材料分层试验结果和有限元软件中的模拟结果进行比较,证明其能较准确地模拟含裂纹的复合材料分层损伤问题。并将数值程序应用在复合材料分层损伤机理的研究中,对比双线性内聚力模型和基于势能的PPR内聚力模型,结果表明基于势能的PPR损伤准则用于计算分层损伤具有计算成本低、收敛性高、准确度高的优点,进一步阐明了峰值强度、内聚区长度、复合材料的铺层角度对内聚力模型数值收敛性和计算精确度的影响规律。Based on the cohesive zone model, this paper develops the numerical calculation method of the three-dimensional zero-thickness cohesive element, and combines the finite element theory to derive the finite element format of the bilinear cohesive zone model and the PPR cohesive zone model. By using the ABAQUS-UEL subroutine module, a three-dimensional eight-node cohesive zone element was developed. Compared with the actual composite material layering test results and the simulation results in ABAQUS, it is proved that it can simulate the problem of composite material delamination damage accurately. The numerical program is applied to the study of the delamination damage mechanism of composite materials. The results show that the PPR cohesive zone model based on potential energy has lower computational cost, higher convergence for calculating delamination damage, higher accuracy. What′s more, it further clarifies the influence of peak strength, cohesion zone length, and composite layering angle on the numerical convergence and calculation accuracy of the cohesion model.

关 键 词：复合材料层合板 ABAQUS-UEL子程序 FORTRAN语言 内聚力模型 分层损伤 

分 类 号：TB332[一般工业技术—材料科学与工程]