Mechanical Properties of 2-D Lattice Materials
Mechanical Properties of 2-D Lattice Materials
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二维晶格材料的机械性能
DOI：
10.4028/www.scientific.net/amr.33-37.585
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发表时间：
2008-03
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格子结构具有一系列的热机械性能，这表明它们可以应用于超轻型结构，以及用于冲击/爆炸改进系统和散热介质。考虑到结构的合理各向异性可以提高荷载效率，提出了两种可按任意方向比刚度和比强度设计的二维点阵材料：变厚度单元和变方向单元。分析了变厚度Kagome盒的力学性能，包括有效弹性模量、屈服强度和任意方向的弹性屈曲强度。由于二维晶格材料的剪切屈曲是一种重要的破坏模式，特别是在相对密度较低的情况下，本文还计算了各种二维晶格材料的剪切屈曲强度。结果表明，与金刚石单元相比，厚度比m=0.5的变厚度Kagome单元具有相同的弹性模量和屈服面，并具有更高的屈曲强度。
Lattice structures have ranges of thermo-mechanical properties that suggest their implementation in ultralight structures, as well as for impact/blast amelioration systems and heat dissipation media. Considering that proper anisotropy of structure could increase load efficiency, two kinds of 2-D lattice materials designable in specific stiffness and strength of arbitrary direction have been brought forward: variational thickness cell and variational direction cell. The mechanical properties of variational thickness Kagome cell have been analyzed, including effective elastic modulus, yield strength and elastic buckling strength in arbitrary directions. Since the shear buckling of 2-D lattice materials is an important collapse mode especially when relative densities are low, shear buckling strength of various 2-D lattice materials have also been calculated. It is found that compared with the diamond cell, the variational thickness Kagome cell of thickness ratio, m=0.5, possesses the same elastic modulus and yield surface, and higher buckling strength.