冲击载荷下Ti/CFRP层合板结构的数值模拟分析  

Numerical simulation analysis of Ti/CFRP laminate structure under impact load

作　　者：谢新宇 葛建立[1] 孙全兆[1] 杨国来[1] Xie Xinyu;Ge Jianli;Sun Quanzhao;Yang Guolai(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《南京理工大学学报》2020年第4期385-391,共7页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(51705253,11572158);十三五预研重点项目(30107040705)。

摘　　要：为了研究钛合金/碳纤维增强复合材料(Ti/CFRP)层合板结构的抗冲击性能,采用基于三维Hashin准则的VUMAT材料子程序模拟复合材料层合板的损伤失效,采用内聚力单元模拟层合板与钛合金之间的胶层,采用Johnson-Cook本构模型模拟钛合金的塑性变形及失效,建立了Ti/CFRP层合板结构的冲击损伤有限元模型。分别讨论了冲击动能、钛板的厚度及复合材料的铺层角度等因素对层合板结构的抗冲击性能的影响,结果显示增加钛板的厚度可以有效提高层合板结构的抗冲击性能,Ti/CFRP层合板结构承受冲击载荷发生损伤失效时,失效模式以基体失效与拉伸分层失效为主,合理选择铺层角度可以改善复合材料层合板的抗冲击性能。分析结果可为Ti/CFRP层合板结构的设计及工程应用提供参考。In order to study the impact resistance of titanium alloy/carbon fiber reinforced plastic(Ti/CFRP)laminate structure,the VUMAT material subroutine based on the three-dimensional Hashin criterion is used to simulate the damage and failure of composite laminates,and the cohesive unit is used to simulate the glue layer between CFRP and titanium alloy.The plastic deformation and failure of titanium alloy are simulated by a Johnson-Cook constitutive model.The impact damage finite element model of Ti/CFRP laminate structure is established.The effects of the impact kinetic energy,the thickness of the titanium plate and the layup angle of the composite on the impact resistance of the laminate structure are discussed.The results show that the increase of the thickness of the titanium plate can effectively improve the impact resistance of the laminate structure.When the Ti/CFRP laminate structure is damaged due to the impact load,the failure modes are mainly matrix failure and tensile delamination failure.A reasonable choice of layer angle can improve the impact resistance of the composite laminate.The analysis results can provide reference for the design and engineering application of the Ti/CFRP laminate structure.

关 键 词：钛合金板 合板结构 碳纤维增强复合材料 冲击动力学 冲击损伤失效 复合材料铺层角度 

分 类 号：TB332[一般工业技术—材料科学与工程]