Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第31卷    第2期    总第263期    2021年2月

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文章编号:1004-0609(2021)-02-0384-17
多孔金属材料失效模式的数理分析
刘培生,周茂奇

(北京师范大学 核科学与技术学院 射线束技术教育部重点实验室,北京 100875)

摘 要: 三维网状多孔金属材料已广泛应用于工程领域,本文借助于数理分析,综合介绍了此类材料在常见载荷形式作用下的失效模式,并对相关环节展开探讨。全面分析了该材料在单向压缩、双向压缩和三向压缩等压缩载荷形式下的失效行为,重点讨论了多孔产品在不同压缩载荷形式下的孔棱拉断和剪切断裂破坏模式,以及在三向压缩载荷形式下可能出现的孔棱屈曲失效模式。结果表明:此类材料承受压缩、弯曲、扭转、剪切等载荷时在多数场合将表现出孔棱拉断的破坏模式,但也存在孔棱趋于剪切断裂这一破坏模式的情况。

 

关键字: 多孔材料;泡沫金属;常见载荷; 失效模式

Mathematical analysis of failure mode for porous metallic materials
LIU Pei-sheng, ZHOU Mao-qi

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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