杨氏模量和泊松比是工程材料最为基本的两个力学指标.多孔金属是一种兼具功能和结构双重属性的优秀工程材料,采用"八面体分析模型",研究了三维网状泡沫金属的这两个性能指标,发现其表观杨氏模量与多孔体的孔率有比较复杂的数理关系,而其表观泊松比则是一个与孔率无关的特征材料常数.
Young's modulus and Poisson ratio are two indexes of most basic mechanical properties of engineering materials. Porous metal foam is a class of excellent engineering materials with dual attributes of structural and functional characteristics, and those two indexes are investigated with the "octahedron model" for these materials. The results reveal that the apparent Young's modulus shows a quite complicated mathematical relationship to porosity of the porous body, and the apparent Poisson ratio is a character of material constant not relative to porosity of the porous metal foams.
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