Behavior of Metallic Foam under Shock Wave Loading

Matej Vesenjak,Zoran Ren,Matej Borovinšek,Seiichi Irie,Shigeru Itoh

doi:10.3390/met2030258

Abstract

In this manuscript, the behavior of metallic foam under impact loading and shock wave propagation has been observed. The goal of this research was to investigate the material and structural properties of submerged open-cell aluminum foam under impact loading conditions with particular interest in shock wave propagation and its effects on cellular material deformation. For this purpose experimental tests and dynamic computational simulations of aluminum foam specimens inside a water tank subjected to explosive charge have been performed. Comparison of the results shows a good correlation between the experimental and simulation results.

Highlights

Metal foams (Figure 1), which have an attractive combination of physical and mechanical properties, such as low density and high specific stiffness in relation to their weight, are extremely important for many branches of modern industry
Metal foams were a subject of some intensive research studies in past years, there is still a lack of their mechanical characterization data, especially under dynamic loading conditions
The shock wave propagation through the cellular material structure due to impact loading has a significant effect on its deformation mechanism and is imperative to understand its effects thoroughly

Summary

Introduction

Metal foams (Figure 1), which have an attractive combination of physical and mechanical properties, such as low density and high specific stiffness in relation to their weight, are extremely important for many branches of modern industry. Their behavior under mechanical loading mainly depends on relative density and base material, with other influential factors being morphology (open or closed cell), geometry and topology (regular or irregular structure) of the cellular structure [1,2,3,4,5,6]. Their research results show, that the amount of absorbed mechanical energy through cellular structure deformation heavily depends on the applied strain rate, since the energy absorption at a strain rate of 1,400 s−1 is approximately

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