(北京師范大學(xué) 核科學(xué)與技術(shù)學(xué)院 射線束技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室，北京 100875)
摘 要: 三維網(wǎng)狀多孔金屬材料已廣泛應(yīng)用于工程領(lǐng)域，本文借助于數(shù)理分析，綜合介紹了此類材料在常見載荷形式作用下的失效模式，并對(duì)相關(guān)環(huán)節(jié)展開探討。全面分析了該材料在單向壓縮、雙向壓縮和三向壓縮等壓縮載荷形式下的失效行為，重點(diǎn)討論了多孔產(chǎn)品在不同壓縮載荷形式下的孔棱拉斷和剪切斷裂破壞模式，以及在三向壓縮載荷形式下可能出現(xiàn)的孔棱屈曲失效模式。結(jié)果表明：此類材料承受壓縮、彎曲、扭轉(zhuǎn)、剪切等載荷時(shí)在多數(shù)場合將表現(xiàn)出孔棱拉斷的破壞模式，但也存在孔棱趨于剪切斷裂這一破壞模式的情況。
關(guān)鍵字: 多孔材料；泡沫金屬；常見載荷; 失效模式
（Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China）
Abstract:Three-dimensional reticulated porous metallic materials can be widely used in engineering fields. For these materials subject to common loading, the failure modes are synthetically introduced by means of mathematical analysis, with expanded investigations on the relevant links. The failure behaviors are comprehensively analyzed for these materials subject to compressive loadings, including uniaxial, biaxial and triaxial compressions. The tensile fracture and the shearing breakage are specially discussed for the pore strut in the porous product under different compressive loads, as well as the possible buckling failure of the pore strut in the porous product under triaxial compression. The analysis results show that these materials will display the tensile fracture in most cases under compression, bending, torsion and shearing, but sometimes also tend to the shearing breakage.
Key words: porous material; metal foam; common loading; failure mode
