Vectran材料的抗拉性能仿真与验证  

Simulation and Verification of Tensile Properties of Vectran Material

作　　者：廖惠东 钟利萍[1] 刘杰[2] 刘星伯[2] 

机构地区：[1]中南林业科技大学机电工程学院,湖南长沙410004 [2]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082

出　　处：《计算机仿真》2016年第2期413-417,共5页Computer Simulation

基　　金：国家科技支撑计划(2012BAH09B02)

摘　　要：Vectran材料是火星气囊常用材料。作为一种较为复杂的复合材料,其性能很难确定,利用理论方法得出材料弹性模量的解析解。为了研究该材料的抗拉特性,利用大型商用非线性有限元软件建立了材料的有限元模型,以弹性模量理论解作为材料的输入属性,研究了在拉伸时的应力-应变及变形-加载特性。结果表明,延伸率较大时边角处应力过大,网格畸变严重,导致单元失效并发生断裂。最后,通过拉伸试验验证了有限元模型的有效性。可为研究火星气囊设计提供一定理论依据。Vectran fiber reinforced composite is a material used for making Mars airbags. The properties of Vectran material are very hard to be known precisely as a complex composite material. Firstly,the analytic expressions of elastic modulus of the material are studied in this paper. In order to study the tensile properties of the material,the finite element analysis（ FEA） model is established by means of commercial nonlinear FEA software. The analytic solution of the elastic modulus is used as the input in the FEA model and then the tensile stress-strain and deformation-load characters are investigated. The results show that the stress in the corner is overlarge when the elongation is large enough,and simultaneously the deformation of the grids is too serious to lead the failure of the elements and the fracture of the material. The validity of the finite element models is also verified by tensile tests. The study can provide a theoretical basis for the design of the Mars airbags.

关 键 词：复合材料 抗拉性能 有限元仿真 

分 类 号：TH232[机械工程—机械制造及自动化]