界面层对层状各向异性复合结构中Lamb波的影响

建立了各向异性界面层的弹簧模型,并将其应用于分析层状复合媒质的全局矩阵技术中.其 引入的机理是全局矩阵的程序结构、各层矩阵的排列不至于遭受大的破坏.因此,把弹簧界 面作为一个“材料层”.该层的材料常数用劲度常数来描述,其层厚为零.把该层放在全局矩 阵适当的位置而使系统中的其他层不发生任何变化.数值示例显示了刚性联接、滑移联接、 完全脱层三种不同界面条件下双层各向异性复合结构中Lamb波的频散特征,并对刚性联接和 滑移联接时质点沿板厚方向的位移分布进行了比较.关键词：各向异性界面弹簧模型全局矩阵兰姆波频散

The influence of interface layer characteristics on Lamb waves in layered anisot ropic media

In this paper, the spring model for the anisotropic interface layer is built and introduced to the global matrix technique that is popularly used for analyzing layered composites. In introducing the spring interface condition, the philosoph y adopted is to incorporate it with a minimum disruption to the program s tructure, particularly the assembly of the global matrix. The spring interface h as therefore been introduced as a "material layer". This layer has material cons t ants which govern the stiffness across it and has zero thickness. The layer can be built into the appropriate location in the global matrix without making any changes in the other layers of the system. Numerical computations for the Lamb w ave dispersion curves in two-layered anisotropic composite media with different interface conditions including rigid connection, slip connection, and complete d isbond are made,and plots of the through-thickness particle displacement distr i butions of Lamb modes for the rigid bond interface and slip bond interface are c ompared.