Mechanical Properties and Energy Absorption Capability of Closed-Cell Al Alloy Foam

2012 ◽  
Vol 450-451 ◽  
pp. 325-328
Author(s):  
Wei Han Yang ◽  
Zhan Guang Wang ◽  
Ping Cai ◽  
Jing Zhi Hu
Keyword(s):  
Mechanical Properties ◽  
Energy Absorption ◽  
Al Alloy ◽  
Closed Cell ◽  
Al Alloy Foam

Mechanical Properties and Energy Absorption Capability of Closed-Cell Al Alloy Foam

2012 ◽  
Vol 450-451 ◽  
pp. 325-328 ◽  
Author(s):  
Wei Han Yang ◽  
Zhan Guang Wang ◽  
Ping Cai ◽  
Jing Zhi Hu
Keyword(s):  
Energy Absorption ◽  
Engineering Application ◽  
Strain Curve ◽  
Al Alloy ◽  
Compression Tests ◽  
Theoretical Support ◽  
Closed Cell ◽  
Al Foam ◽  
Collapse Region ◽  
Al Alloy Foam

Based on compression tests of closed-cell Al alloy foam measured, mchanical properties and energy absorption capability had been investigated. The compressive stress-strain curve of closed-cell Al foam consists of three distinct regions, i.e., the linear elasticity region, the plastic collapse region or brittle crushing region, and the densification region. Formula on energy absorption capability of closed-cell Al alloy foam was presented, which could provide theoretical support for its engineering application.

scholarly journals Static Mechanical Properties of Expanded Polypropylene Crushable Foam

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 249
Author(s):  
Przemysław Rumianek ◽  
Tomasz Dobosz ◽  
Radosław Nowak ◽  
Piotr Dziewit ◽  
Andrzej Aromiński
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Strain Rate ◽  
Energy Absorption ◽  
Experimental Tests ◽  
Absorption Capacity ◽  
Strain Rates ◽  
Foam Density ◽  
Energy Absorption Capacity ◽  
Closed Cell

Closed-cell expanded polypropylene (EPP) foam is commonly used in car bumpers for the purpose of absorbing energy impacts. Characterization of the foam’s mechanical properties at varying strain rates is essential for selecting the proper material used as a protective structure in dynamic loading application. The aim of the study was to investigate the influence of loading strain rate, material density, and microstructure on compressive strength and energy absorption capacity for closed-cell polymeric foams. We performed quasi-static compressive strength tests with strain rates in the range of 0.2 to 25 mm/s, using a hydraulically controlled material testing system (MTS) for different foam densities in the range 20 g/dm3 to 220 g/dm3. The above tests were carried out as numerical simulation using ABAQUS software. The verification of the properties was carried out on the basis of experimental tests and simulations performed using the finite element method. The method of modelling the structure of the tested sample has an impact on the stress values. Experimental tests were performed for various loads and at various initial temperatures of the tested sample. We found that increasing both the strain rate of loading and foam density raised the compressive strength and energy absorption capacity. Increasing the ambient and tested sample temperature caused a decrease in compressive strength and energy absorption capacity. For the same foam density, differences in foam microstructures were causing differences in strength and energy absorption capacity when testing at the same loading strain rate. To sum up, tuning the microstructure of foams could be used to acquire desired global materials properties. Precise material description extends the possibility of using EPP foams in various applications.

scholarly journals Compressive Behaviour of Aluminium Pyramidal Lattice Material-Filled Tubes

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3817
Author(s):  
Yingjie Huang ◽  
Wenke Zha ◽  
Yingying Xue ◽  
Zimu Shi
Keyword(s):  
Mechanical Properties ◽  
Energy Absorption ◽  
Al Alloy ◽  
Compressive Behaviour ◽  
Lattice Material ◽  
Empty Tube ◽  
Thin Walled

This study focuses on the uniaxial compressive behaviour of thin-walled Al alloy tubes filled with pyramidal lattice material. The mechanical properties of an empty tube, Al pyramidal lattice material, and pyramidal lattice material-filled tube were investigated. The results show that the pyramidal lattice material-filled tubes are stronger and provide greater energy absorption on account of the interaction between the pyramidal lattice material and the surrounding tube.

Fabrication of Mg-Al alloy foam with close-cell structure by powder metallurgy approach and its mechanical properties

2016 ◽  
Vol 22 ◽  
pp. 290-296 ◽  
Author(s):  
Donghui Yang ◽  
Zhongyun Hu ◽  
Weiping Chen ◽  
Jun Lu ◽  
Jianqing Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Cell Structure ◽  
Al Alloy ◽  
Powder Metallurgy Approach ◽  
Al Alloy Foam

scholarly journals Closed-Cell Powder Metallurgical Aluminium Foams Reinforced with 3 vol.% SiC and 3 vol.% Graphite

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 2031
Author(s):  
Jaroslav Kováčik ◽  
Martin Nosko ◽  
Natália Mináriková ◽  
František Simančík ◽  
Jaroslav Jerz
Keyword(s):  
Mechanical Properties ◽  
Energy Absorption ◽  
Modulus Of Elasticity ◽  
Nominal Composition ◽  
Constant Density ◽  
Damping Properties ◽  
Compression Tests ◽  
Foaming Agent ◽  
Reinforcing Particles ◽  
Closed Cell

Closed-cell aluminium foams (nominal composition: AlSi12Mg0.6Fe0.3) were prepared by the powder metallurgical route (using 0.4 wt.% TiH2 untreated powder as the foaming agent). Pure foams and foams with the addition of 3 vol.% graphite or SiC powder were prepared. The microstructure and mechanical properties of the prepared aluminium foams containing reinforcing particles were investigated at constant density and compared to those of the pure foam. Vibration measurements were performed to determine the damping properties and modulus of elasticity of the foams. Uniaxial compression tests were performed to determine the following mechanical properties: collapse stress, efficiency of energy absorption, plateau length and densification strain of the foams. All the foams behaved in a brittle manner during compression. Finally, the effect of admixed graphite and SiC powders on the properties of the investigated foam was evaluated, discussed and modelled. The addition of powders changed all investigated properties of the foams. Only the efficiency of energy absorption at constant density was almost identical.

Effect of Solution Heat Treatment on Microstructure and Mechanical Properties of Al Alloy FOAM

2005 ◽  
Vol 475-479 ◽  
pp. 437-440
Author(s):  
Sang Min Lee ◽  
K. Ryu ◽  
Young Jae Kwon ◽  
J.G. Kim ◽  
Won Seung Cho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solution Heat Treatment ◽  
Al Alloy ◽  
Microstructure And Mechanical Properties ◽  
Al Alloy Foam

New Type Spherical Pores Al Foam and its Properties

2011 ◽  
Vol 250-253 ◽  
pp. 584-587
Author(s):  
Zhan Guang Wang ◽  
Ping Cai ◽  
Zhen Wu Wang
Keyword(s):  
Energy Absorption ◽  
Metal Foam ◽  
Strain Curve ◽  
Compressive Yield Strength ◽  
Al Alloy ◽  
Al Foam ◽  
New Type ◽  
High Plastic ◽  
Al Alloy Foam ◽  
Good Agreement

Based on compression curves of spherical pores Al foam measured, compressive yield strength, the densification starting pointand energy absorption had been investigated. The compressive stress-strain curve of spherical pores Al foam consists of three distinct regions, i.e., the linear elasticity region, yield platform stage and the densification region. The way to determine the densification starting pointεDof high density metal foam has been presented. Spherical pores Al foam is a cellular metal material of high plastic performance, so energy absorption capability of it is bigger than that of spherical pores Al alloy foam. Compressive yield stress was in good agreement with Gibson-Ashby model’s expectation．

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