考虑90°子铺层的T300/69层合板断裂韧性数值模拟和实验研究  

Numerical simulation and experimental research on fracture toughness of T300/69 laminated considering 90°sub-layup

作　　者：韦尧兵 王雪雪 靳翌帆 刘俭辉[1] 郎珊珊[1] WEI Yao-bing;WANG Xue-xue;JIN Yi-fan;LIU Jian-hui;LANG Shan-shan(School of Mechanical and Electrical Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Xi’an Xianyang International Airport Limited Company,Xi’an 710000,China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050 [2]西安咸阳国际机场股份有限公司,陕西西安710000

出　　处：《兰州理工大学学报》2023年第6期33-40,共8页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金青年基金(51605212);甘肃省科技计划项目(21JR7RA783,20JR10RA161);甘肃省青年博士基金(2021QB-139)。

摘　　要：针对现有复合材料层合板断裂韧性计算模型忽略了90°子铺层和纤维脱粘对断裂韧性的影响,提出了修正的断裂韧性计算方法.首先,在研究正交异性纤维增强复合材料断裂韧性时,借助ABAQUS有限元软件,使用扩展有限元法模拟T300/69纤维增强复合材料层合板裂纹扩展过程,分析90°子铺层对层合板整体断裂韧性的影响.其次,考虑纤维脱粘效应结合能量释放率建立考虑90°子铺层影响的断裂韧性模型.最后,通过紧凑拉伸实验,利用位移-载荷数据研究不同铺层方式下T300/69复合材料层合板的断裂韧性,验证该模型的准确性.结果表明,该模型所得断裂韧性与实验结果误差较小,更贴近实际情况,对实际工程具有较为重要的指导意义.A modified fracture toughness calculation method is proposed in this research to address the shortcoming that the existing fracture toughness calculation model for composite laminates ignores the effects of 90°sub-layers and fiber debonding on fracture toughness.First,in the study of fracture toughness of orthotropic anisotropic fiber-reinforced composites,an extended finite element method is used to simulate the crack expansion process of T300/69 fiber-reinforced composite laminate with the help of ABAQUS finite element software to analyze the effect of 90°sub-layers on the overall fracture toughness of the laminate.Next,the fracture toughness model considering the effect of fiber debonding combined with energy release rate was established considering the effect of 90°sub-layers.Finally,the fracture toughness of T300/69 composite laminate under different paving methods is studied by compact tensile experiments using displacement-load data to verify the accuracy of the model.The results show that the fracture toughness obtained from the model proposed in this paper exhibits minimal disparities from the experimental results,thereby rending it more representative of the real-world applications.The proposed model holds significant practical implications for practical engineering.

关 键 词：能量释放率 断裂韧性 90°子铺层 纤维脱粘 

分 类 号：TH114[机械工程—机械设计及理论] O346.2[理学—固体力学]