Studies on the Dynamic Compressive Properties of Open-Celled Aluminum Alloy Foams

Abstract

The compressive deformation behavior of open-cell aluminum foams with different densities and morphologies was assessed under quasi-static and dynamic loading conditions. High strain rate experiments were conducted using a split Hopkinson pressure bar technique at strain rates ranging from 500 to 1 2000 − s . The experimental results shown that the compressive stress-strain curves of aluminum foams also have the “ three regions” character appeared in general foam materials, namely elastic region, collapse region and densification regions. It is found that density is the primary variable characterizing the modulus and yield strength of foams and the cell appears to have a negligible effect on the strength of foams. It also is found that yield strength and energy absorption is almost insensitive to strain rate and deformation is spatially uniform for the open-celled aluminum foams, over a wide range of strain rates.

Dynamic response of functionally graded cellular materials based on the Voronoi model

“…The cellular structure was divided into five equal-size layers with height ∆H=H/5, and assigned different cell wall thicknesses to each layer. The density gradient-β -was defined as 1 ( 1,2,3,4) (take in Fig.2) …”

“…Considerable experimental and numerical studies have been conducted to investigate the dynamic behavior of cellular materials [1][2][3][4][5][6][7][8][9][10][11][12]. The deformation, crushing stress and energy absorption as well as the cell geometric topology of the uniform cellular materials have been studied systematically.…”

Experimental-numerical studies of the effect of cell structure on the mechanical properties of polypropylene foams

“…Li et al (16) had developed this model for two-dimensional cell solids with irregular cell shape and uneven cell wall thickness, which were two common defects in such cell solids. Some researchers (17)(18)(19)(20) have also carried out scale finite element simulation to study the quasi-static compressive behavior of porous materials. They provided an effective method to quantitatively and qualitatively simulate the compressive stress of cell materials.…”

Microstructure and properties of open‐cell Ni–Sn–P alloy foams prepared by electroless plating

“…Attributed to their unique three‐dimensional network structure, metal foams possess a series of excellent mechanical and functional properties, such as a large specific surface area, high porosity, electromagnetic shielding, sound, and energy absorption capacity, and can be used as not only structural materials but also functional materials . Currently, metal foams have been widely applied to railway or aerospace industries, catalyst and catalyst carrier, thermal insulation and filter materials …”