Preparation and Properties of Closed Cell Aluminum–Fly Ash Floating Beads Composite Foam

2012 ◽  
Vol 217-219 ◽  
pp. 59-62
Author(s):  
Hong Feng Luo ◽  
Shao Jie Weng ◽  
Yue Li ◽  
Zhi Shui Chen ◽  
Mao Lin
Keyword(s):  
Fly Ash ◽  
Strain Curve ◽  
Processing Parameters ◽  
Compression Tests ◽  
Static Compression ◽  
Composite Foam ◽  
Foaming Agent ◽  
Closed Cell ◽  
Compression Region ◽  
Foaming Temperature

Closed cell aluminum–fly ash floating beads composite foam was fabricated by stirring casting method. The reasonable processing parameters are: the foaming temperature is 750°C, the amount of foaming agent is 2%, and the foaming time is 8 min. Quasi-static compression tests shows that stress and strain curve of closed cell aluminum–fly ash floating beads composite foam have three regions, i.e. the elastic region, the stress platform region and the compression region.

Preparation of Foam Glass Ceramics from Phosphorus Slag

2010 ◽  
Vol 105-106 ◽  
pp. 600-603 ◽  
Author(s):  
Ben Xu ◽  
Kai Ming Liang ◽  
J.W. Cao ◽  
Y.H. Li
Keyword(s):  
Glass Powder ◽  
Foam Glass ◽  
Glass Ceramics ◽  
Processing Parameters ◽  
Treatment Temperature ◽  
Homogeneous Distribution ◽  
Sintering Process ◽  
Foaming Agent ◽  
Foaming Temperature ◽  
Foam Glass Ceramics

Phosphorus slag could be used to prepare wollastonite glass ceramics. With the aid of incorporated foaming agent, foam glass ceramics can be obtained via the sintering of the slag-based glass. After the glass powder reacted with graphite, macro-size pores with homogeneous distribution were formed. The level of porosity of the fabricated foams was controlled by varying heat treatment temperature and amount of foaming agent. It was found that the preferential processing parameters for producing foam glass ceramics were foaming temperature of 1000°C with holding time of 10 min and 1 wt. % of graphite. In this case, the porosity reached about 80%. The results show that dominant crystalline phase is wollastonite, and the high compression strength results from the crystallization of glass during sintering process.

Study on the Failure Mode of Corrugated Paperboard during Transport and Distribution

2012 ◽  
Vol 200 ◽  
pp. 118-121
Author(s):  
Rong Hou Xia ◽  
Yan Feng Guo ◽  
Wei Zhang
Keyword(s):  
Plastic Deformation ◽  
Failure Modes ◽  
Strain Curve ◽  
Core Layer ◽  
Bottom Layer ◽  
Compression Tests ◽  
Static Compression ◽  
Structure Damage ◽  
Compression Speed ◽  
Corrugated Structure

Corrugated paperboard is a kind of inexpensive and environmental-friendly packaging material and may be made into cushioning package pads to protect products from damaging during transport and distribution. By virtue of the static compression tests and impose four kinds of different compression speed on two kinds corrugated paperboard pads, This paper obtains the failure modes and the stress and strain curve. The results show that the failure of the corrugated board exhibit four stages, the linear elastic stage, the yield stage, plastic deformation and densification stage. The damage of corrugated structure pads occurs on yield and plastic deformation stage and structure damage mostly is shear crimpling on core layer. The damage of double layer corrugated paperboard is separated layer, first the bottom layer be damaged, then the top layer, until the corrugated paperboard is damaged wholly. In addition, we also find that the static compression speed has not significantly influence on the corrugated paperboard.

Effect of Laser Forming on the Energy Absorbing Behavior of Metal Foams

2021 ◽  
pp. 1-29
Author(s):  
Tom Zhang ◽  
Yubin Liu ◽  
Nathan Ashmore ◽  
Wayne Li ◽  
Y. Lawrence Yao
Keyword(s):  
Metal Foam ◽  
Laser Forming ◽  
Compression Tests ◽  
Forming Process ◽  
Static Compression ◽  
Closed Cell ◽  
Similarities And Differences ◽  
Energy Absorbing ◽  
The Impact ◽  
Quasi Static Compression

Abstract Metal foam is light in weight and exhibits an excellent impact absorbing capability. Laser forming has emerged as a promising process in shaping metal foam plates into desired geometry. While the feasibility and shaping mechanism has been studied, the effect of the laser forming process on the mechanical properties and the energy absorbing behavior in particular of the formed foam parts has not been well understood. This study comparatively investigated such effect on as-received and laser formed closed-cell aluminum alloy foam. In quasi-static compression tests, attention paid to the changes in the elastic region. Imperfections near the laser irradiated surface were closely examined and used to help elucidate the similarities and differences in as-received and laser formed specimens. Similarly, from the impact tests, differences in deformation and specific energy absorption were focused on, while relative density distribution and evolution of foam specimens were numerically investigated.

Effect of Processing Parameters on the Cellular Morphology and Mechanical Properties of Thermoplastic Polyolefin (TPO) Microcellular Foams

2006 ◽  
Author(s):  
Steven Wong ◽  
Hani E. Naguib ◽  
Chul B. Park
Keyword(s):  
Mechanical Properties ◽  
Saturation Pressure ◽  
Batch Process ◽  
Processing Parameters ◽  
Average Cell Size ◽  
Average Cell ◽  
Microcellular Foams ◽  
Closed Cell ◽  
Foaming Temperature ◽  
Thermoplastic Polyolefin

In this study, the effects of processing parameters on the cellular morphologies and mechanical properties of TPO70 (Thermoplastic Polyolefin) microcellular foams are investigated. Microcellular closed cell TPO70 foams were prepared using a two-stage batch process method. The microstructure of these foamed samples was controlled by carefully altering the processing parameters such as saturation pressure, foaming temperature and foaming time. The foam morphologies were characterized in terms of the cell density, foam density and average cell size. Elastic modulus, tensile strength, and elongation at break of the foamed TPO70 samples were measured for different cell morphologies. The findings show that the mechanical properties were significantly affected by the foaming parameters which varied with the cell morphologies. The experimental results can be used to predict the microstructure and mechanical properties of microcellular polymeric TPO70 foams prepared with different processing parameters.

Study on the Process for Fabricating Fly-Ash Floating Beads Particle Reinforced Aluminum Foam Matrix Composite

2012 ◽  
Vol 557-559 ◽  
pp. 381-384
Author(s):  
Hong Feng Luo ◽  
Xin Fu ◽  
Zhi Shui Chen ◽  
Zhi Zhong Guo ◽  
Dong Liang
Keyword(s):  
Fly Ash ◽  
Matrix Composite ◽  
Influence Factors ◽  
Process Condition ◽  
Test Method ◽  
Foaming Agent ◽  
Orthogonal Test Method ◽  
Al Foam ◽  
Foaming Temperature ◽  
Foaming Time

Fly-ash floating beads particle reinforced Al foam matrix composite was fabricated by stirring casting method. Orthogonal test method shows that main influence factors on the fabrication of Al foam matrix composite from big to small in proper order is foaming time, foaming temperature, and amount of foaming agent. The optimum preparation process condition is as following: the foaming temperature is 800°C, the amount of foaming agent is 3%, and the foaming time is 12 min.

Multi Functional Behavioural Analysis of Al-SiC Metal Matrix Composite Foam Produced by (TiH2-CaCO3) Dual Foaming Agent

2010 ◽  
Author(s):  
Joyjeet Ghose ◽  
Vinay Sharma ◽  
Surender Kumar
Keyword(s):  
Metal Matrix ◽  
Empirical Relationship ◽  
Compressive Modulus ◽  
Test Results ◽  
Compression Tests ◽  
Composite Foam ◽  
Foaming Agent ◽  
Behavioural Analysis ◽  
Composite Foams ◽  
Impedance Tube Method

Aluminium alloy composite foams reinforced by 5% vol. SiC particles were fabricated with melt foaming route using TiH2-CaCO3 dual foaming agent. The compressive modulus and strength of two different relative density aluminium foams were investigated experimentally. An empirical relationship was established between normalized change in density and strain, using experimental data of compression tests up to different strain levels. Sound absorption property of the developed material was found out by impedance tube method. Acoustic test results indicate the potential of the material as sound absorber.

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.

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.

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