scholarly journals Structural and physico-mechanical characterization of closed-cell aluminum foams with different zinc additions

2018 ◽  
Vol 25 (4) ◽  
pp. 789-795 ◽  
Author(s):  
Ankur Bisht ◽  
Brijesh Gangil
Keyword(s):  
Compressive Strength ◽  
Energy Absorption ◽  
Room Temperature ◽  
Mechanical Characterization ◽  
Pure Aluminum ◽  
Zinc Content ◽  
Aluminum Foams ◽  
Static Behavior ◽  
Closed Cell

Abstract Closed-cell aluminum foams with different percentages of zinc content were successfully prepared and investigated. The foamable precursors were prepared in a pit furnace by adding calcium as thickening agent, calcium carbonate as blowing agent and different percentages (0 wt.%, 0.5 wt.% and 1 wt.%) of zinc particles at 650–750°C. The distribution of Zn elements and quassi-static behavior of the foams at room temperature were investigated. The experimental results show that Zn element is uniformly distributed in cell wall matrix. The distribution of Zn elements had a significant effect on the quasi-static compressive behavior of aluminum foams; from the results, it is obvious that zinc-containing foams possessed higher compressive strength and energy absorption capacities than pure aluminum foams. Hence, it can be concluded that increase in percentage of Zn particles helps to increase the compressive strength, plateau region and energy absorption, in addition to providing better and uniform pores.

scholarly journals Quasi-Static Compression Deformation and Energy Absorption Characteristics of Basalt Fiber-Containing Closed-Cell Aluminum Foam

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 921 ◽  
Author(s):  
Donghui Yang ◽  
Zichen Zhang ◽  
Xueguang Chen ◽  
Xing Han ◽  
Tao Xu ◽  
...  
Keyword(s):  
Pore Size ◽  
Energy Absorption ◽  
Cell Walls ◽  
Aluminum Foam ◽  
Pure Aluminum ◽  
Present Condition ◽  
Aluminum Foams ◽  
Commercially Pure ◽  
Closed Cell ◽  
Absorption Characteristics

In this work, closed-cell aluminum foams with 4 wt.% contents of short-cut basalt fibers (BFs) were successful prepared by using the modified melt-foaming method. The pore size of BF-containing aluminum foam and commercially pure aluminum foam was counted. The distribution of BF and its effect on the compressive properties of closed-cell aluminum foams were investigated. The results showed that the pore size of BF-containing aluminum foams was more uniform and smaller. BF mainly existed in three different forms: Some were totally embedded in the cell walls, some protruded from the cell walls, and others penetrated through the cells. Meanwhile, under the present condition, BF-containing aluminum foams possessed higher compressive strength and energy absorption characteristics than commercially pure aluminum foams, and the reasons were discussed.

Quasi-Static Compressive Characteristics of Cu-Containing Closed-Cell Aluminum Foams

2017 ◽  
Vol 748 ◽  
pp. 173-180
Author(s):  
Jing Wang ◽  
Zan Zhang ◽  
Jian Ding ◽  
Chuan Rong Qiu ◽  
Xing Chuan Xia ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Compressive Strength ◽  
Aluminum Foam ◽  
Pure Aluminum ◽  
Aging Treatment ◽  
Compressive Properties ◽  
Aluminum Foams ◽  
Commercially Pure ◽  
Closed Cell ◽  
Heat Treated

Closed-cell aluminum foam with different percentages of Cu was prepared by melt foaming method.The effect of Cu element on the quasi-static compressive properties of aluminum foam was investigated, both under as-cast and heat-treated conditions. The results showed that Cu element distributed in cell wall matrix mainly in the forms of Al-Cu solid solutions and AlCu3, Al6.1Cu1.2Ti2.7 intermetallics. Meanwhile, Cu-containing foams possessed much higher compressive strength than the commercially pure aluminum foams. Additionally, proper heat treatment could further improve the yield strength of Cu-containing foams and the effect of aging treatment was more obvious than the homogenizing heat treatment under the present conditions and the reasons were discussed.

Synthesis of Closed Cell Aluminum Foam Using the Compression Method

2013 ◽  
Vol 711 ◽  
pp. 195-198
Author(s):  
Suthiphong Sopha ◽  
Santirat Nansa-Arang ◽  
Prachya Peasura
Keyword(s):  
Mechanical Properties ◽  
Bulk Density ◽  
Room Temperature ◽  
Aluminum Foam ◽  
Pure Aluminum ◽  
Powder Size ◽  
Compression Method ◽  
Aluminum Foams ◽  
Body Of Knowledge ◽  
Closed Cell

This research was to study the synthesis of aluminum foam with pure aluminum and its mechanical properties. The synthesis varied at 1% - 5% of TiH2 and mixed with 99.7 % aluminum powder size of 44 µm. then compressed by hydraulic at 25, 30 and 35 tons in the diameter 27 mm, high 60 mm molded. The Aluminum foams were produced by using heat treatment at 800 °C for 10 minutes then cool to room temperature and tested its mechanical properties. The results showed that aluminum foams which lowest bulk density (0.958 g/cm3) was 2% TiH2 synthesized, compressed at 35 tons and highest bulk density (1.393 g/cm3) was 1% TiH2 synthesized, compressed at 25 tons. Moreover, the highest compressive strength (847 kg/cm2) showed at 2% TiH2 synthesized and compressed at 35 tons. Thus, this research contributes to a body of knowledge that informs the application of aluminum foam.

Energy - Absorption and Efficiency Diagrams of Rigid PUR Foams

2014 ◽  
Vol 601 ◽  
pp. 246-249 ◽  
Author(s):  
Emanoil Linul ◽  
Dan Andrei Serban ◽  
Tudor Voiconi ◽  
Liviu Marsavina ◽  
Tomasz Sadowski
Keyword(s):  
Energy Absorption ◽  
Room Temperature ◽  
Loading Rate ◽  
Compression Modulus ◽  
Constant Load ◽  
Compressive Properties ◽  
Plateau Stress ◽  
Closed Cell ◽  
Rise Direction

Polyurethane (PUR) foam materials represent a class of materials widely used for impact protection and energy absorption. This paper presents a characterization of different rigid PUR foams under compressive impact loading by means of energy absorption and efficiency diagrams. Compressive properties were investigated on cubic specimens on the foams’ rise direction at room temperature with a loading rate of 3.09 m/s for three different closed-cell foams with densities of 100 kg/m3, 160 kg/m3 and 300 kg/m3 respectively. Experimental results show that the compression modulus, yield stress and plateau stress increase with density. Most of the energy is absorbed in the plateau region because of the cell deformation associated with this phenomenon, allowing greater absorption of impact energy at nearly constant load. Authors have found that both the energy absorption and efficiency diagrams are consistent and present similar results for studied foams.

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.

Mechanical characterization of closed-cell polyolefin foams

2000 ◽  
Vol 75 (1) ◽  
pp. 156-166 ◽  
Author(s):  
M. A. Rodr�guez-P�rez ◽  
J. I. Velasco ◽  
D. Arenc�n ◽  
O. Almanza ◽  
J. A. De Saja
Keyword(s):  
Mechanical Characterization ◽  
Closed Cell

scholarly journals Energy Absorption of Different Cell Structures for Closed-Cell Foam-Filled Tubes Subject to Uniaxial Compression

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1579 ◽  
Author(s):  
Yang Yu ◽  
Zhuokun Cao ◽  
Ganfeng Tu ◽  
Yongliang Mu
Keyword(s):  
Energy Absorption ◽  
Absorption Efficiency ◽  
Foam Core ◽  
Aluminum Foams ◽  
Static Compression ◽  
Cell Structures ◽  
Closed Cell ◽  
Energy Absorption Efficiency ◽  
Foam Filled ◽  
Quasi Static Compression

The energy absorption of different cell structures for closed-cell aluminum foam-filled Al tubes are investigated through quasi-static compression testing. Aluminum foams are fabricated under different pressures, obtaining aluminum foams with different cell sizes. It is found that the deformation of the foam core is close to the overall deformation, and the deformation band is seriously expanded when the cell size is fined, which leads to the increase of interaction. Results confirm that the foam-filled tubes absorb more energy due to the increase of interaction between the foam core and tube wall when the foaming pressure increases. The energy absorption efficiency of foam-filled tubes can reach a maximum value of 90% when the foam core is fabricated under 0.30 MPa, which demonstrates that aluminum foams fabricated under increased pressure give a new way for the applications of foam-filled tubes in the automotive industry.

Compression Characterization of Polyurethane Foams with Different Formulations of Polyol and MDI

2015 ◽  
Vol 815 ◽  
pp. 74-78
Author(s):  
Sinar Arzuria Adnan ◽  
Firuz Zainuddin ◽  
Hazizan Md. Akil ◽  
Sahrim Hj Ahmad
Keyword(s):  
Compressive Strength ◽  
Energy Absorption ◽  
Palm Oil ◽  
Polyurethane Foams ◽  
Methylene Diphenyl Diisocyanate ◽  
Pu Foams

Rigid polyurethane (PU) foams were prepared with palm oil based polyols (POP) and methylene diphenyl diisocyanate (MDI) in order to archieve rigid formulations. The effect of the different amount of MDI (1 wt.%, 1.1 wt.% and 2 wt.%) were studied in density, compressive strength and energy absorption. It was found that the higher compressive strength of the PU foams showed at 1.604 MPa whereas the amount of MDI increased to 1.1 wt. %. The increased amount of MDI to 2 wt.% showed the higher value in density (0.0531 kg/m3) and energy absorption with 46.490 J for 70 % displacement.

Sign in / Sign up

Export Citation Format

Share Document