多孔金属介质的力学性能及其参数依赖性研究
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摘要
采用万能材料试验机(MTS)和扫描电子显微镜(SEM)对几种典型多孔泡沫铜的准静态力学特性及其微观特征进行研究。结果表明,材料的压缩过程为典型的三阶段形式:弹性段、平台段和密实段;其力学性能不但依赖相对密度,而且受平均孔径的影响。材料力学性能的孔径依赖性主要是由其结构的各向异性所致。
By means of material testing systems(MTS)and scanning electron microscope(SEM),the mechanical properties and microstructural characteristics of several porous copper foams were investigated.The results show that the compression behavior of these materials presents three typical stages,which are elastic stage,plateau stage and densification stage.Their mechanical properties depend on not only the relative density but also the pore size.Meanwhile,the dependence of mechanical properties on the pore size is mainly due to the structural anisotropy.
By means of material testing systems(MTS)and scanning electron microscope(SEM),the mechanical properties and microstructural characteristics of several porous copper foams were investigated.The results show that the compression behavior of these materials presents three typical stages,which are elastic stage,plateau stage and densification stage.Their mechanical properties depend on not only the relative density but also the pore size.Meanwhile,the dependence of mechanical properties on the pore size is mainly due to the structural anisotropy.
引文
[1]卢天健,何德坪,陈常青,等.超轻多孔金属材料的多功能特性及应用[J].力学进展,2006,36(4):517-535.LU Tian-jian,HE De-ping,CHEN Chang-qing,et al.The multifunctionality of ultra-light porous metals and their applications[J].Advances in Mechanics,2006,36(4):517-535.
[2]GIBSON L J,ASHBY M F.Cellular solids:structures and properties[M].Cambridge:Cambridge University Press,1997.
[3]VAN DER BURG M M D,SHULMEISTER V,VAN DER GEISSEN E,et al.On the linear elastic properties of regular and random open-cell foam models[J].J Cell Plast,1997,33(1):31-54.
[4]ZHU H X,WINDLE A H.Effects of cell irregularity on the high strain compression of open-cell foams[J].Acta Materialia,2002,50(5):1041-1052.
[5]WARREN W E,KRAYNIK A M.The linear elastic properties of open cell foams[J].J Appl Mech,1988,55(2):341-346.
[6]NIEH T G,HIGASHI K,WADSWORTH J.Effect of cell morphology on the compressive properties of open-cell aluminum foams[J].Material Science and Engineering,2002,283(1-2):105-110.
[7]ONCK P R,ANDREWS E W,GIBSON L J.Size effects in ductile cellular solids.Part I:modeling[J].International Journal of Mechanical Sciences,2001,43(3):681-669.
[8]卢子兴,王建月.开孔Voronoi泡沫支柱形状变化对力学性能的影响[J].航空动力学报,2009,24(9):2008-2011.LU Zi-xing,WANG Jian-yue.Influence of cell strut shape on the mechanical properties of Voronoi open-cell foams[J].Journal of Aerospace Power,2009,24(9):2008-2011.
[9]赵隆茂,宋延泽,李志强.基于Voronoi随即模型研究多孔材料的动态特性[J].机械强度,2009,31(6):932-938.ZHAO Long-mao,SONG Yan-ze,LI Zhi-qiang.Study of the dynamic crushing behavior of cellular materials by using the Voronoi random models[J].Journal of Mechanical Strength,2009,31(6):932-938.
[10]潘艺,胡时胜,凤仪,等.泡孔尺寸对开孔泡沫铝合金力学性能的影响[J].工程力学,2003,20(4):171-175.PAN Yi,HU Shi-sheng,FENG Yi,et al.Cell-size effect on mechanical properties of open-cell aluminum alloy foam[J].Engineering Mechanics,2003,20(4):171-175.
[11]刘培生,夏风金,罗军.多孔材料模型分析[J].材料工程,2009,(7):83-87.LIU Pei-sheng,XIA Feng-jin,LUO Jun.Analyses of the classical model for porous materials[J].Journal of Materials Engineering,2009,(7):83-87.
[12]曹晓卿,王志华,马宏伟,等.微观结构对多孔材料细观力学特性的影响[J].太原理工大学学报,2006,37(1):1-4.CAO Xiao-qing,WANG Zhi-hua,MA Hong-wei,et al.The effects of micro-structure on the equivalent elastic constants of cellular materials[J].Journal of Taiyuan University of technology,2006,37(1):1-4.
[13]许庆彦,熊守美.多孔金属的制备工艺方法综述[J].铸造,2005,54(9):840-843.XU Qing-yan,XIONG Shou-mei.Manufacturing processes of porous metals[J].Foundry,2005,54(9):840-843.
[2]GIBSON L J,ASHBY M F.Cellular solids:structures and properties[M].Cambridge:Cambridge University Press,1997.
[3]VAN DER BURG M M D,SHULMEISTER V,VAN DER GEISSEN E,et al.On the linear elastic properties of regular and random open-cell foam models[J].J Cell Plast,1997,33(1):31-54.
[4]ZHU H X,WINDLE A H.Effects of cell irregularity on the high strain compression of open-cell foams[J].Acta Materialia,2002,50(5):1041-1052.
[5]WARREN W E,KRAYNIK A M.The linear elastic properties of open cell foams[J].J Appl Mech,1988,55(2):341-346.
[6]NIEH T G,HIGASHI K,WADSWORTH J.Effect of cell morphology on the compressive properties of open-cell aluminum foams[J].Material Science and Engineering,2002,283(1-2):105-110.
[7]ONCK P R,ANDREWS E W,GIBSON L J.Size effects in ductile cellular solids.Part I:modeling[J].International Journal of Mechanical Sciences,2001,43(3):681-669.
[8]卢子兴,王建月.开孔Voronoi泡沫支柱形状变化对力学性能的影响[J].航空动力学报,2009,24(9):2008-2011.LU Zi-xing,WANG Jian-yue.Influence of cell strut shape on the mechanical properties of Voronoi open-cell foams[J].Journal of Aerospace Power,2009,24(9):2008-2011.
[9]赵隆茂,宋延泽,李志强.基于Voronoi随即模型研究多孔材料的动态特性[J].机械强度,2009,31(6):932-938.ZHAO Long-mao,SONG Yan-ze,LI Zhi-qiang.Study of the dynamic crushing behavior of cellular materials by using the Voronoi random models[J].Journal of Mechanical Strength,2009,31(6):932-938.
[10]潘艺,胡时胜,凤仪,等.泡孔尺寸对开孔泡沫铝合金力学性能的影响[J].工程力学,2003,20(4):171-175.PAN Yi,HU Shi-sheng,FENG Yi,et al.Cell-size effect on mechanical properties of open-cell aluminum alloy foam[J].Engineering Mechanics,2003,20(4):171-175.
[11]刘培生,夏风金,罗军.多孔材料模型分析[J].材料工程,2009,(7):83-87.LIU Pei-sheng,XIA Feng-jin,LUO Jun.Analyses of the classical model for porous materials[J].Journal of Materials Engineering,2009,(7):83-87.
[12]曹晓卿,王志华,马宏伟,等.微观结构对多孔材料细观力学特性的影响[J].太原理工大学学报,2006,37(1):1-4.CAO Xiao-qing,WANG Zhi-hua,MA Hong-wei,et al.The effects of micro-structure on the equivalent elastic constants of cellular materials[J].Journal of Taiyuan University of technology,2006,37(1):1-4.
[13]许庆彦,熊守美.多孔金属的制备工艺方法综述[J].铸造,2005,54(9):840-843.XU Qing-yan,XIONG Shou-mei.Manufacturing processes of porous metals[J].Foundry,2005,54(9):840-843.