Experimental investigation on the yield behavior of metal foam under shear-compression combined loading

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外文摘要：Metal foams are typically subjected to quasi-static or dynamic shear-compression combined loading in applications such as energy absorbers and structure protectors.The yield behavior of a metal foam under dynamic and quasi-static shear-compression combined loadings is investigated in this study.First,quasi-static and dynamic compression-shear combined tests at different loading angles are conducted using a universal testing machine and a rotatable Hopkinson bar system,respectively.Shear deformation reduces the plateau stress as the loading angle increases.Subsequently,the yield modes of the metal foam under combined loadings are investigated.Only one yield band occurs under a combined loading with large loading angles(mode Ⅰ),whereas several yield bands occur under a combined loading with small loading angles(mode Ⅱ).Finally,the yield surface plot of metal foam indicates significant enhancement in terms of normal stress and shear stress under dynamic loading.Quasi-static and dynamic phenomenological yield criteria for a shear-normal stress space are established to provide a brief and precise prediction of the behavior of metal foam under quasi-static and dynamic combined loadings.

外文关键词：

metal foamyield behaviorshear-compression combined loadingyield modeyield criterion

作者：

LUO Geng、XUE Pu、LI YuLong

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作者单位：

School of Automobile,Chang'an University,Xi'an 710064,China

School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China

Joint International Research Laboratory of Impact Dynamics and its Engineering Applications,Northwestern Polytechnical University,Xi'an 710072,China

基金：

项目编号：

1167224812072288

出版年：

2021

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDCSCDSCIEI

影响因子：1.056

ISSN：1674-7321

年,卷(期)：2021.64(7)

参考文献量24