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力学与实践 ›› 2008, Vol. 30 ›› Issue (1): 35-40.doi: 10.6052/1000-0992-2007-074

• 应用研究 • 上一篇    下一篇

蜂窝铝芯的弹性模量和材料效率分析

孙德强 张卫红   

  1. 西北工业大学机电学院,陕西 西安 710072 西北工业大学中法并行工程联合实验室 710072
  • 收稿日期:2007-02-15 修回日期:2007-05-24 出版日期:2008-02-08 发布日期:2008-02-08

ELASTIC MODULI AND MATERIAL EFFICIENCY OF ALUMINUM HONEYCOMB CORES

  • Received:2007-02-15 Revised:2007-05-24 Online:2008-02-08 Published:2008-02-08

摘要: 考虑共面载荷作用时薄壁蜂窝铝孔壁的弯曲、伸缩和剪切变形,基于Timoshenko粱理论精 确推导出了其共面弹性模量的计算公式,并利用壳单元设计了利用蜂窝铝特征单元来求共异 面弹性模量的有限元方法. 对厂家提供的两种蜂窝样品分别利用理论和有限元法进行了计算, 计算结果和实验数据相吻合,证明理论公式和有限元法的正确性. 最后就结构参数对蜂窝铝 各弹性模量相关材料效率的影响规律进行了分析.

Abstract: With bending, shear and tension deformations being considered in the thin-walled beams within aluminum honeycomb cores under in-plane loadings, the analytical formulas for the in-plane elastic moduli of the aluminum honeycomb cores are derived based on Timoshenko beam theory. The finite element simulation methods for calculating these moduli for a representative unit cell are proposed based on shell elements. The calculations on the elastic moduli of two kinds of aluminum honeycomb cores are carried out, respectively, by using the theoretical and finite element methods. The agreement between the calculated results and the experimental data has verified the theoretical formulas and finite element simulation method. Finally, the effects of aluminum honeycomb cores' configuration parameters on their material efficiency are analyzed.