摘要
文章提出了一种新的变刚度铺层轨迹设计方法,即采用一对互相共轭的标量场函数实现复合材料变刚度铺层的轨迹定义和铺层设计。最后,通过有限元建模和算例对比方法,对直线铺放层合板和变刚度铺放层合板进行压缩特征值屈曲分析和非线性屈曲分析,得出变刚度铺放层合板的屈曲特性比直线铺放层合构件提高约23.62%,y方向的屈曲变形位移减小为直线铺层构件的59.47%,大幅度提高了构件的抗压缩屈曲特性,同时也验证了该设计方法的可行性和实用价值。
The variable stiffness layup method was put forward to optimize the component mechanical characteristics and failure resistance. A new variable stiffness path planning method was designed. A pair of scalar field functions, which are orthotropic at ev-ery intersect point, were used to define and plan the layup of laminate. Finally, the eigen value buckling analysis and nonlinear buckling analysis were conducted by means of FEM method, and the comparison between the straight fiber method and the variable stiffness method was done. The simulation results show that the buckling property can be improved by 23.62%, and the deformations in y-axis decrease to 59.47% of the original one. The capacity of anti-buckling of the specimen is greatly improved. The feasibility of the design method and practical value are verified.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2014年第6期848-855,共8页
Journal of Solid Rocket Technology
基金
国家自然科学基金(11372220)
关键词
变刚度铺放
标量场函数
正交铺层
压缩屈曲分析
variable stiffness tow-placing
scalar field function
orthogonal layup
compression buckling analysis
