Effect of pore size and relative density on the mechanical properties of open cell aluminum foams

2007 ◽  
Vol 56 (2) ◽  
pp. 169-172 ◽  
Author(s):  
Bin Jiang ◽  
Zejun Wang ◽  
Naiqin Zhao
Keyword(s):  
Mechanical Properties ◽  
Relative Density ◽  
Pore Size ◽  
Aluminum Foams ◽  
Open Cell

THE RANDOM POROUS STRUCTURE AND MECHANICAL RESPONSE OF LIGHTWEIGHT ALUMINUM FOAMS

2014 ◽  
Vol 1662 ◽  
Author(s):  
Max Larner ◽  
John Acker ◽  
Lilian P. Dávila
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Relative Density ◽  
Testing Machine ◽  
Sound Insulation ◽  
Full Potential ◽  
Open Cell ◽  
Compressive Loads ◽  
Al Foam ◽  
Al Foams

ABSTRACTLightweight porous foams have been of particular interest in recent years, since they have a very unique set of properties which can be significantly different from their solid parent materials. These properties arise from their random porous structure which is generated through specialized processing techniques. Their unique structure gives these materials interesting properties which allow them to be used in diverse applications. In particular, highly porous Al foams have been used in aircraft components and sound insulation; however due to the difficulty in processing and the random nature of the foams, they are not well understood and thus have not yet been utilized to their full potential. The objective of this study was to integrate experiments and simulations to determine whether a relationship exists between the relative density (porous density/bulk density) and the mechanical properties of open-cell Al foams. Compression experiments were performed using an Instron Universal Testing Machine (IUTM) on ERG Duocel open-cell Al foams with 5.8% relative density, with compressive loads ranging from 0-6 MPa. Foam models were generated using a combination of an open source code, Voro++, and MATLAB. A Finite Element Method (FEM)-based software, COMSOL Multiphysics 4.3, was used to simulate the mechanical behavior of Al foam structures under compressive loads ranging from 0-2 MPa. From these simulated structures, the maximum von Mises stress, volumetric strain, and other properties were calculated. These simulation results were compared against data from compression experiments. CES EduPack software, a materials design program, was also used to estimate the mechanical properties of open-cell foams for values not available experimentally, and for comparison purposes. This program allowed for accurate prediction of the mechanical properties for a given percent density foam, and also provided a baseline for the Al foam samples tested via the IUTM method. Predicted results from CES EduPack indicate that a 5.8% relative density foam will have a Young’s Modulus of 0.02-0.92 GPa while its compressive strength will be 0.34-3.37 MPa. Overall results revealed a relationship between pores per inch and selected mechanical properties of Al foams. The methods developed in this study can be used to efficiently generate open-cell foam models, and to combine experiments and simulations to calculate structure-property relationships and predict yielding and failure, which may help in the pursuit of simulation-based design of metallic foams. This study can help to improve the current methods of characterizing foams and porous materials, and enhance knowledge about theirproperties for novel applications.

scholarly journals Manufacturing of open-cell aluminum foams via infiltration casting in super-gravity fields and mechanical properties

RSC Advances ◽  
2018 ◽  
Vol 8 (29) ◽  
pp. 15933-15939 ◽  
Author(s):  
Zhe Wang ◽  
Jintao Gao ◽  
Kuan Chang ◽  
Long Meng ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Foams ◽  
Open Cell ◽  
Gravity Fields

Replicated open-cell aluminum foams were produced by infiltration casting in super-gravity fields.

Density-Graded Aluminum Foams by the Corrosion Method

2007 ◽  
Vol 539-543 ◽  
pp. 1903-1908 ◽  
Author(s):  
Yoshihisa Matsumoto ◽  
A.H. Brothers ◽  
David C. Dunand
Keyword(s):  
Corrosion Rate ◽  
Relative Density ◽  
Experimental Method ◽  
Surface State ◽  
Processing Parameters ◽  
Metallic Surfaces ◽  
Aluminum Foams ◽  
Open Cell ◽  
Mass Losses ◽  
Solution Treated

Optimum corrosive density-grading of T6- and solution-treated alloys was studied using NaOH solutions. Rough corroded strut surfaces in aluminum foams were found to transform to smooth metallic surfaces with an increase in pH from 10 to 13. For instance, during immersion in pH13 solutions, pits with large curvatures appeared on strut surfaces, and corrosive mass losses increased. Strut diameters also decreased, and open cell windows became wider, without an increase in visible damage. Processing parameters such as pH, corrosion rate, and the surface state of the struts were examined to optimize final structure. An experimental method for grading of relative density continuously between 10% and 5% is described.

Effect of Cell Size on the Dynamic Compressive Properties of Aluminum Alloy Foams

2007 ◽  
Vol 124-126 ◽  
pp. 1317-1320 ◽  
Author(s):  
Zhi Hua Wang ◽  
Hong Wei Ma ◽  
Long Mao Zhao ◽  
Gui Tong Yang
Keyword(s):  
Aluminum Alloy ◽  
Yield Strength ◽  
Strain Rate ◽  
Relative Density ◽  
Cell Size ◽  
Cell Morphology ◽  
Compressive Properties ◽  
Aluminum Foams ◽  
Open Cell ◽  
Mechanical Responses

The static and dynamic compressive behaviors of open-cell aluminum alloy foams with virtually the same relative density of 0.4 were investigated. The foams have different cell sizes (0.5mm, 1.5mm, 2.5mm) but similar cell morphology and microstructure. The yield strength of these foams was characterized as a function of strain rate and cell morphology. The experimental results indicated that the mechanical responses of foams are sensitive to strain rate, and dependent of the cell size. The present results are compared in details with recent findings obtained from the aluminum foams.

Effect of annealing on the mechanical properties of nano-copper reinforced open-cell aluminum foams

2014 ◽  
Vol 613 ◽  
pp. 340-351 ◽  
Author(s):  
Yi Sun ◽  
Rigoberto Burgueño ◽  
Wei Wang ◽  
Ilsoon Lee
Keyword(s):  
Mechanical Properties ◽  
Aluminum Foams ◽  
Open Cell

Effect of Y2O3 on the mechanical properties of open cell aluminum foams

2006 ◽  
Vol 60 (13-14) ◽  
pp. 1665-1668 ◽  
Author(s):  
N.Q. Zhao ◽  
B. Jiang ◽  
X.W. Du ◽  
J.J. Li ◽  
C.S. Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Foams ◽  
Open Cell

Equivalent Elastic Modulus of the Open-Cell Cellular Solids

2010 ◽  
Vol 34-35 ◽  
pp. 1501-1505
Author(s):  
Ying An Kang ◽  
Jia Cai Tan
Keyword(s):  
Relative Density ◽  
Geometrical Structure ◽  
Three Dimensional ◽  
Cellular Structures ◽  
Cellular Solids ◽  
Aluminum Foams ◽  
Open Cell ◽  
Prism Model ◽  
Theoretical Results ◽  
Good Agreement

The useful properties of cellular solids depend on the material from which they are made, their relative density, and their internal geometrical structure. Based on two simple models (two-dimensional honeycomb and three-dimensional prism)of cellular structures, equivalent Young’s modulus related to the relative density is derived, and the theoretical results are found to be in good agreement with experimental data of open cell aluminum foams. And the results provide evidence that the three-dimensional prism model is reasonable, which two models are approximately true at low density.

Experimental Study on Compression Mechanical Properties of Aluminum Foams with Passive Confined Pressure

2013 ◽  
Vol 788 ◽  
pp. 147-151
Author(s):  
Cheng Bing Li ◽  
Jing You Chen
Keyword(s):  
Mechanical Properties ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Compression ◽  
Testing Machine ◽  
Rate Sensitivity ◽  
Enhancement Effect ◽  
Hopkinson Pressure Bar ◽  
Aluminum Foams ◽  
Open Cell ◽  
The Impact

Abstract: Quasi-static and dynamic compression of open-cell and close-cell aluminum foams were investigated by MTS-809 material testing machine and Split Hopkinson Pressure Bar under the free state and passive confined pressure conditions. Experimental results indicate that the passive confined pressure has an important impact on quasi-static and dynamic compression mechanical properties of open-cell and close-cell aluminum foams. The enhancement effect of the passive confined pressure on close-cell aluminum foams is stronger than the impact on open-cell aluminum foams. The quasi-static and dynamic compression processes of aluminum foams consist of elastic stage, yield platform stage and compacting stage. The open-cell and close-cell aluminum foams investigated have strain rate sensitivity characteristics.

Preparation and Characterisation of Open-Cell Microporous Nickel

2007 ◽  
Vol 539-543 ◽  
pp. 1833-1838 ◽  
Author(s):  
Yasuo Yamada ◽  
Takumi Banno ◽  
Zhen Kai Xie ◽  
Yun Cang Li ◽  
Cui E Wen
Keyword(s):  
Mechanical Properties ◽  
Pore Size ◽  
Average Pore Size ◽  
Microporous Structure ◽  
Macroporous Structure ◽  
Average Pore ◽  
Open Cell ◽  
Nickel Foams ◽  
Sintering Method ◽  
Compressive Tests

In the present study, nickel foams with an open cell microporous structure were fabricated by the so-called space-holding particle sintering method, which included the adding of a particulate polymeric material (PMMA). The average pore size of the nickel foams approximated 10.5 μm; and the porosity ranged from 70 % to 80 %. The porous characteristics of the nickel foams were observed using scanning electron microscopy and the mechanical properties were evaluated using compressive tests. For comparison, nickel foams with an open-cell macroporous structure (pore size approximately 1.3 mm) were also presented. Results indicated that the nickel foams with a microporous structure possess enhanced mechanical properties than those with a macroporous structure.

Reinforcing Open Cell Aluminum Foams by Amorphous Ni-P Coating

2016 ◽  
Vol 879 ◽  
pp. 684-689
Author(s):  
Zhen Dong Li ◽  
Ying Jie Huang ◽  
Xin Fu Wang ◽  
Xing Fu Wang ◽  
Fu Sheng Han
Keyword(s):  
Mechanical Properties ◽  
Young’S Modulus ◽  
Surface Coating ◽  
Young's Modulus ◽  
High Strength ◽  
Functional Material ◽  
Aluminum Foams ◽  
Open Cell ◽  
Coated Film ◽  
Enhancement Technologies

Open cell aluminum foams are a promising multi-functional material that has potential application in a variety of engineering fields, but their too low mechanical properties may restrict their applications in some load bearing conditions. To overcome this shortcoming, enhancement methods have been widely investigated in recent years including surface enhancement technologies. In the present study, an electrodeposition process was utilized to coat an amorphous Ni-P coating on the cell strut surface of open cell aluminum foams. The results show that the coated film exhibits typical amorphous feature and is thermally stable. The average nanohardness and Young’s modulus are 7.0GPa and 118.1GPa, respectively, in which the Young’s modulus is even 1.6 times higher than that of aluminum (70GPa). It is because the high strength film that leads to significantly enhancement of the foams. The compression strength of the foam was increased from about 0.2MPa to 11.9MPa when the film thickness was around 65μm. These results demonstrate that the surface coating does be an effective way to improve the mechanical properties of open cell aluminum foams.

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