High strain rate behavior of composite metal foams

被引：87

作者：

Alvandi-Tabrizi, Y. ^{[1
]}

Whisler, D. A. ^{[2
]}

Kim, H. ^{[2
]}

Rabiei, A. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

[2] Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 631卷

关键词：

Composite metal foam; Dynamic loading; Quasi-static loading; Hopkinson bar; Casting; Powder metallurgy; ALUMINUM-ALLOY FOAMS; STEEL; IMPACT;

D O I：

10.1016/j.msea.2015.02.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mechanical properties of Composite Metal Foams (CMFs) under low speed loading conditions have been considered in a number of studies. This paper aims to extend the current knowledge by investigating the compressive behavior of CMF under higher loading rates. Hopkinson bar experiment was conducted on samples processed through powder metallurgy and casting techniques. The effect of loading rate, sample geometry and sphere size on the mechanical properties and energy absorption capacity was studied. The obtained results reveal that increasing the loading rate improves the strength of CMF especially at strain levels below 30%. This strengthening due to high strain rate loading is mostly attributed to the strain rate sensitivity of the parent metals and the pressurization of the entrapped air inside the spheres. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：248 / 257

页数：10

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