Application of the finite element method to postbuckling analysis of laminated plates
Application of the finite element method to postbuckling analysis of laminated plates
复制标题
有限元法在层合板后屈曲分析中的应用
DOI：
10.2514/3.12850
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Teng
中科院分区：
文献类型：
--
作者：
L. Shiau;Teng
基于von Karman大变形假设，采用简化的高阶剪切变形板理论，建立了一种72自由度高精度高阶三角形板单元，用于分析复合材料层合板在边缩短或面内压缩载荷作用下的后屈曲行为。通过考察各模总势能的局部极小值，给出了一幅清晰的屈曲图样变化图。结果表明，在一定的材料特性和边界条件下，板的屈曲模式可能发生变化。文中还讨论了横向剪切效应对屈曲花样变化的影响。结果表明，在考虑横向剪切变形的情况下，屈曲发生后不久，屈曲振型将从第一振型转变为第二振型。
Based on the von Karman large deformation assumptions, a 72-degree-of-freedom high-precision higher order triangular plate element using a simplified higher order shear deformation plate theory is developed for the analysis of postbuckling behavior of a composite laminated plate subjected to edge shortening or in-plane compressive loading. By examining the local minimum of total potential energy of each mode, a clear picture of buckled pattern change is presented. Results show that the buckled pattern change may occur for plates with certain material properties and boundary conditions. The important transverse shear effect on the buckled pattern change is also presented. It shows that the buckling mode will shift from first to second mode shortly after buckling occurs if the transverse shear deformation is included.