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.

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.

scholarly journals Preparation and Behavior of Bamboo Fiber-Reinforced Polydimethylsiloxane Composite Foams during Compression

Fibers ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 91 ◽  
Author(s):  
Isa Zubaidah ◽  
Abdullah Norfatriah ◽  
Serbini Zatul Amali ◽  
Abu Zuruzi
Keyword(s):  
Compression Test ◽  
Bamboo Fiber ◽  
Test Results ◽  
Fiber Reinforced ◽  
Compression Tests ◽  
Pressure Sensing ◽  
Stiffness Coefficients ◽  
Composite Foams ◽  
And Behavior ◽  
Good Agreement

This study investigates the mechanical properties of bamboo fiber-reinforced polydimethylsiloxane (BF-PDMS) foams with up to 3.4% (by mass) fiber during compression. Pristine PDMS foams and BF-PDMS composite foams were fabricated using a sugar leaching method. Compression test results of pristine PDMS and BF-PDMS composite foams display plateau and densification regions. Predictions of a modified phenomenological foam (PF) model based on Maxwell and Kelvin–Voight models are in good agreement with compression test results. Stiffness coefficients were extracted by fitting results of compression tests to the modified PF model. Spring and densification coefficients of BF-PDMS composite foams are 2.5- and 15-fold greater than those of pristine PDMS foams, respectively. Strains corresponding to onset of densification computed using extracted coefficients were 35% and 25% for pristine PDMS foams and BF-PDMS composite foams, respectively. Compressing foams at 6.0 and 0.5 mm/min results in highest and lowest compressive stress, respectively. Insights from this study are useful in many areas such as environmental protection, pressure sensing, and energy where PDMS composite foams will find applications.

scholarly journals Confinement effects for rubberised concrete in tubular steel cross-sections under combined loading

2021 ◽  
Vol 21 (2) ◽  
Author(s):  
A. Mujdeci ◽  
D. V. Bompa ◽  
A. Y. Elghazouli
Keyword(s):  
Axial Compression ◽  
Cross Section ◽  
Cross Sections ◽  
Image Correlation ◽  
Combined Loading ◽  
Test Results ◽  
Compression Tests ◽  
Confinement Effects ◽  
Rubber Content ◽  
Dependent Modification

AbstractThis paper describes an experimental investigation into confinement effects provided by circular tubular sections to rubberised concrete materials under combined loading. The tests include specimens with 0%, 30% and 60% rubber replacement of mineral aggregates by volume. After describing the experimental arrangements and specimen details, the results of bending and eccentric compression tests are presented, together with complementary axial compression tests on stub-column samples. Tests on hollow steel specimens are also included for comparison purposes. Particular focus is given to assessing the confinement effects in the infill concrete as well as their influence on the axial–bending cross-section strength interaction. The results show that whilst the capacity is reduced with the increase in the rubber replacement ratio, an enhanced confinement action is obtained for high rubber content concrete compared with conventional materials. Test measurements by means of digital image correlation techniques show that the confinement in axial compression and the neutral axis position under combined loading depend on the rubber content. Analytical procedures for determining the capacity of rubberised concrete infilled cross-sections are also considered based on the test results as well as those from a collated database and then compared with available recommendations. Rubber content-dependent modification factors are proposed to provide more realistic representations of the axial and flexural cross-section capacities. The test results and observations are used, in conjunction with a number of analytical assessments, to highlight the main parameters influencing the behaviour and to propose simplified expressions for determining the cross-section strength under combined compression and bending.

scholarly journals Experimental Study on Improvement of Marine Soft Soil with Alkali Residue

2018 ◽  
Vol 53 ◽  
pp. 04021
Author(s):  
SHAO Yong ◽  
LIU Xiao-li ◽  
ZHU Jin-jun
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Void Ratio ◽  
Soft Soil ◽  
Compressive Modulus ◽  
Engineering Properties ◽  
Test Results ◽  
Use Of Resources ◽  
One Year

Industrial alkali slag is the discharge waste in the process of alkali production. About one million tons of alkali slag is discharged in China in one year. It is a burden on the environment, whether it is directly stacked or discharged into the sea. If we can realize the use of resources, it is a multi-pronged move, so alkali slag is used to improve solidified marine soft soil in this paper. The test results show that the alkali residue can effectively improve the engineering properties of marine soft soil. Among them, the unconfined compressive strength and compressive modulus are increased by about 10 times, and the void ratio and plasticity index can all reach the level of general clay. It shows that alkali slag has the potential to improve marine soft soil and can be popularized in engineering.

Mechanical properties of melt infiltration and powder metallurgy fabricated aluminum metal matrix composite

2021 ◽  
pp. 095440542110159
Author(s):  
Mahmoud Awad ◽  
Noha M Hassan ◽  
Sathish Kannan
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Composite Foam ◽  
Space Holder ◽  
Aluminum Metal Matrix Composite ◽  
Melt Infiltration ◽  
Innovative Material ◽  
And Coping

Metal foams have drawn an increasing interest especially in applications where weight and energy absorption are critical. Despite the extensive studies available on their characterization and enhanced fabrication techniques, limited work was found on the possibility of producing a porous composite foam. The objective of this article is to investigate two new synthesis techniques for manufacturing metal matrix composite foam that is, powder metallurgy and melt infiltration. Both techniques are studied using Sodium Chloride (NaCl) as a space holder in an aluminum-based metal matrix and graphene nanoparticles as reinforcements. The effect of the quantity added of both the space holder and graphene is studied using designed experiments. Although powder metallurgy provided lower baseline hardness, experimentation results suggest the superiority of the process over melt infiltration in terms of porosity and hardness. Results suggest that baseline aluminum hardness can be increased by up to 21.5% using powder metallurgy and 15% using melt infiltration. In terms of porosity, powder metallurgy porosity increased baseline more than ten folds while melt infiltration only doubled the baseline porosity. Moreover, it is easier to control the macroscopic shape, density, and distribution of the pores using powder metallurgy. It is also easier to disperse the reinforcement homogenously. Results will support several industries such as military, automotive, medical, and aerospace in developing this innovative material with superior properties and coping with their need for advanced applications.

scholarly journals In-plane Shear Strengthening of Unreinforced Masonry Walls Using GFRP Jacketing

2017 ◽  
Author(s):  
Enea Mustafaraj ◽  
Yavuz Yardim
Keyword(s):  
Experimental Results ◽  
Test Results ◽  
Compression Tests ◽  
Shear Strengthening ◽  
Plane Shear ◽  
Standard Size ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Diagonal Compression ◽  
Before And After

In this paper, it is presented the experimental results of a campaign on diagonal compression tests, as of ASTM E519-02, to assess and compare the in-plane behavior of standard size of 1200 × 1200 × 250 mm, for three unreinforced and three reinforced wall panels by glass fiber reinforced polymer (GFRP) embedded in an inorganic matrix.From the diagonal compression test results, were determined some of the main mechanical parameters such as: shear strength, modulus of rigidity and ductility, before and after application of the reinforcement.The experimental results showed that the GFRP reinforced panels exhibited a significant increase of 127% in shear resistance, 1100% in ductility and 650% in modulus of rigidity when compared to unreinforced panels.It was concluded that this technique provided satisfactory results and can be considered a suitable method for repair of masonry structures.

Compressive Behavior of 7xxx Series Al Composites Reinforced with Al2O3

2007 ◽  
Vol 534-536 ◽  
pp. 857-860
Author(s):  
Young Ik Seo ◽  
Kyung Ho Min ◽  
Kyu Hwan Lee ◽  
Young Do Kim
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Al2o3 Particle ◽  
Compression Tests ◽  
Compressive Behavior ◽  
Particle Content ◽  
Blended Powder ◽  
Solution Treated ◽  
N2 Atmosphere ◽  
Compacting Pressure

Mechanical properties of 7xxx series Al metal matrix composite (MMC) powders containing different amounts of ceramic were investigated. The ceramic contents of the starting powders were 5 wt.% or 10 wt.%. 7xxx Al blended powder was used for comparison. The powders were uniaxially cold compacted using a cylindrical die with a compacting pressure of 250 MPa and were sintered at 620oC in a dry N2 atmosphere for 60 min. The heating rate was varied up to 100oC/min. For the heat treatment, sintered parts were solution treated at 475oC and aged at 175oC. Compression tests were conducted to reveal the effect of Al2O3 particle content on the mechanical properties of the composites. Fractography was examined using a scanning electron microscope.

The Influence of Amount of Wood Fiber on New Flame-Retardant Melamine-Urea-Formaldehyde (MUF) Composite Foam

2011 ◽  
Vol 393-395 ◽  
pp. 1012-1017 ◽  
Author(s):  
Yu Feng Ma ◽  
Wei Zhang ◽  
Ling Li ◽  
Ming Ming Zhang ◽  
Zeng Hui Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Cell Shape ◽  
Urea Formaldehyde ◽  
Wood Fiber ◽  
Cell Size Distribution ◽  
Composite Foam ◽  
Composite Foams ◽  
Flame Retardant Properties ◽  
Irregular Cell

New composite foams were prepared by co-foaming of Melamine-Urea-Formaldehyde (MUF) resin and wood fiber in the closed mould at 70°C. The effects of amount of wood fiber on mechanical properties, brittleness, flame-retardant, insulation and microscopic structures of wood fiber-MUF foam were investigated. Results indicated that the flame-retardant properties increased, and the brittleness and mechanical properties decreased with the increase of the amount of wood fiber in composite foams. The addition of wood fiber resulted in more uniform cell size distribution and irregular cell shape, but had little effect on insulation properties.

scholarly journals CORROSION BEHAVIOUR OF ALUMINIUM 6061 NICKEL COATED CENOSPHERE COMPOSITE

2020 ◽  
Vol 15 (3) ◽  
Author(s):  
Arvind R S ◽  
Prasanna Ram M ◽  
Prashanth T ◽  
Jaimon Dennis Quadros
Keyword(s):  
Coal Combustion ◽  
Metal Matrix ◽  
Power Plants ◽  
Corrosion Behaviour ◽  
Thermal Power ◽  
Stir Casting ◽  
Matrix Composites ◽  
Test Results ◽  
Immersion Corrosion ◽  
Aluminium Metal

Cenosphere fly ash is one of the most inexpensive and low-density material which is abundantly available as a solid waste by-product of coal combustion in thermal power plants. Aluminium metal matrix composites with Nickel coated cenospheres as the reinforcement is prepared by stir casting route. The composites are prepared with varying percentages of cenospheres in the percentage of 2-10% by weight of the composite. Immersion corrosion tests are conducted on the composites in three different medium and for three different time durations. It is evident from the test results as well as the microstructure images that the weight loss of samples with 8% Nickel coated cenospheres has shown least corrosion or the highest corrosion resistance when compared to the counterparts.

scholarly journals Study on Flame Retardancy and Mechanism of Talc Composite Foams

2021 ◽  
Vol 8 ◽  
Author(s):  
Xiujuan Li ◽  
Ruisong Guo ◽  
Xiaodong Qian
Keyword(s):  
High Temperature ◽  
Fire Resistance ◽  
Flame Retardancy ◽  
Dense Layer ◽  
Composite Foam ◽  
Fire Extinguishing ◽  
Fuel Burning ◽  
Composite Foams ◽  
Film Forming ◽  
Improved Stability

Under high temperature, aqueous film forming foam extinguishing agent has poor flame retardancy and low fire efficiency. In order to solve this problem, talc was introduced into foam to form composite foam. The fire resistance and fire extinguishing properties of the composite foam were studied. The results showed that talc composite foam had good flame retardant resistance. when the concentration of talc reached 40 g/100 ml, the 50% liquid separation time of the composite foam was 21.1 min. The fuel burning in the anti burning tank did not ignite the gasoline in the oil pan, and burned out at 51.5 min. It was related to the structure of composite foam and the properties of talc. Due to the introduction of talc, the viscosity of the composite foam increased. The network structure of composite foam was important to the improved stability of foam. Talc powder formed a dense layer covering the oil surface, which effectively isolated the oil from the air.

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