基于八面体模型理论的泡沫金属抗拉强度

刘培生 ,  顷淮斌 ,  程伟

航空材料学报 ›› 2026, Vol. 46 ›› Issue (10) : 136 -144.

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航空材料学报 ›› 2026, Vol. 46 ›› Issue (10) : 136 -144. DOI: 10.11868/j.issn.1005-5053.2024.000144

基于八面体模型理论的泡沫金属抗拉强度

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Tensile strength of metallic foams based on octahedral model theory

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摘要

基于八面体模型理论对多孔材料拉伸性能表征的初步工作,对泡沫金属抗拉强度的计算进行研究:一是将材料形式从网状孔隙结构拓展到胞状孔隙结构;二是将表征结果与最为认可的 Gibson-Ashby 模型理论进行比较分析。利用所得拉伸性能关系公式,探讨模型理论在泡沫金属抗拉强度计算中的实践应用。结果表明,八面体模型理论既适用于网状多孔材料,也适用于胞状多孔材料。八面体模型理论和 Gibson-Ashby 模型理论的性能关系表征都能较好地应用于计算泡沫金属抗拉强度,且八面体模型理论的计算效果更好。前者的理论计算偏差多小于 8%;后者的理论计算偏差多为 10% 左右。Gibson-Ashby 模型理论对网状多孔材料的计算偏差较大,接近 20%;对胞状多孔材料的计算偏差较小。

Abstract

Based on the preliminary work on tensile property characterization of porous materials from the octahedral model theory,the characterization of tensile strength for metallic foams is investigated. Firstly,the material form is extended from reticular pore structure to cellular pore structure. Secondly, the characterized results are compared and analyzed against the well-recognized Gibson-Ashby model theory. Using the derived tensile property characterization relationship,the practical application of the model theory in calculating the tensile strength of metallic foams is discussed. The results show that the octahedral model theory is applicable to both reticular porous materials and cellular porous materials. Both the octahedral model theory and the Gibson-Ashby model theory can be well applied to calculate the tensile strength of metallic foams,and the octahedral model theory achieves superior calculation performance. The theoretical calculation deviation for the former is mostly within 8%,while that for the latter is mostly around 10%. The Gibson-Ashby model theory yields a relatively large calculation deviation close to 20% for reticular porous material,whereas its deviation is smaller for cellular porous material.

关键词

多孔材料 / 泡沫金属 / 抗拉强度 / 理论计算

Key words

porous material / metallic foam / tensile strength / theoretical calculation

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刘培生,顷淮斌,程伟. 基于八面体模型理论的泡沫金属抗拉强度[J]. 航空材料学报, 2026, 46(10): 136-144 DOI:10.11868/j.issn.1005-5053.2024.000144

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基金资助

北京师范大学测试基金项目(C24)

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