蜂窝铝压缩变形机制及性能的有限元模拟

蜂窝材料是一种结构比较简单的多孔材料，是研究多孔材料的基础。采用有限元法，对7种不同相对密度的蜂窝铝的压缩过程进行了模拟研究，分析蜂窝铝的变形机制、屈服强度、平台应变和能量吸收特性，结果表明，随着相对密度的增加，蜂窝铝的屈服强度和能量吸收能力增大，而平台应变减小，变形带也越难产生。通过压缩过程的应力分布情况图分析蜂窝铝的压缩变形机制；比较了模拟结果和经验结果，验证了经验公式的适用条件。

Compression Properties and Deformation Behaviour of Aluminum Honeycomb by FES

Honeycomb material is one of cellular materials, and is the basic cellular material in simple structure. The compressive process of 7 kinds aluminum honeycomb with different densities were researched by finite element simulation in this paper. The deformation behaviour, yield strength, strain platform and energy-absorption of the aluminum honeycomb were analyzed. The results show that with the increment of the relative density ,their yield strengths and energy-absorption increased,but strain platform reduced, and thir deformation will be more difficult. It analyzed the deformation behaviour of the aluminum honeycomb in compressive process by the stress distribution. Compared the simulation results with the experience results and verified the suitability for use of the empirical formulas and possibility of the finite element simulation used in this paper.