中國有色金屬學(xué)報(bào)
ZHONGGUO YOUSEJINSHU XUEBAO
| 第18卷 第11期 總第116期 2008年11月 |
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文章編號(hào)：1004-0609(2008)11-2062-06
泡沫金屬在單雙向拉壓載荷作用下的表征分析
劉培生1, 2
(1. 北京師范大學(xué) 射線束技術(shù)與材料改性教育部重點(diǎn)實(shí)驗(yàn)室，北京 100875；
2. 北京師范大學(xué) 核科學(xué)與技術(shù)學(xué)院，北京 100875)
摘 要: 探討泡沫金屬的單向壓縮以及雙向拉壓行為，并研究了該材料單雙向拉伸性能，進(jìn)一步分析該材料在承受各種單雙向拉壓載荷時(shí)的不同響應(yīng)方式。結(jié)果表明：在泡沫金屬材料受到不同的單雙向拉壓載荷作用而產(chǎn)生破壞時(shí)，其承受的各向名義應(yīng)力大小與多孔體的孔率都可表達(dá)為一個(gè)統(tǒng)一的數(shù)理關(guān)系；對(duì)于一個(gè)確定的多孔體材料，其單雙向壓縮負(fù)載能力要分別大于其單雙向拉伸負(fù)載能力。
關(guān)鍵字: 泡沫金屬；多孔金屬；多孔材料；多向載荷
Analysis of porous open-cell metal foams under uniaxial and biaxial loadings
LIU Pei-sheng1, 2
（1. The Key Laboratory of Radiation Beam Technology and Material Modification of National Ministry of Education,
Beijing Normal University, Beijing 100875, China;
2. College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China）
Abstract:The behaviors of uniaxial compression and biaxial tension-compression for metals foams were investigated. The different responding ways were further analyzed combining the research results of properties of uniaxial and biaxial tensions of these materials. The results indicate that the relationship between the nominal stress and the porosity can be expressed as an uniform mathematical-physical formula for the foamed metals under various uniaxial and biaxial loads when the porous body endures the fracture. The loading ability of compression is more than that of tension for the same porous material under uniaxial or biaxial loads.
Key words: metal foam; porous metal; porous material; multi-load
