Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Composites


Effect of Micro Powder on Mechanical and Physical Properties of Glass Fiber Reinforced Epoxy Composite

Aseel Basim Abdul-Hussein; Fadhel Abbas Hashim; Tamara Raad Kadhim

Engineering and Technology Journal, 2016, Volume 34, Issue 7, Pages 1402-1414

In the present study, composites were prepared by Hand lay-up molding. The composites constituents were epoxy resin as the matrix, 3% volume fractions of Glass Fibers (G.F) as re enforcement and 2%, 4%, 6% volume fraction of micro powder (Aluminum Oxide Al2O3, Silicon Oxide SiO2 and Titanium Oxide TiO2) as filler. Studied the, hardness test, flexural strength, density, water absorption measurements and tests were conducted to reveal their values for each type of composite material. The results showed that the non – reinforced epoxy have lower properties than nano composites material. Measured density results had show an incremental increase with volume fraction increase and water absorption, hardness, and flexural strength had show an incremental increase with volume fraction increase and with smaller particle size.

Erosion Wear Behavior of Industrial Material Reinforced Epoxy Resin Composites and its Coating with Natural Based Material

Aseel Basim Abdul-Hussein; Emad Saadi AL-Hassani; Reem Alaa Mohammed

Engineering and Technology Journal, 2015, Volume 33, Issue 4, Pages 902-918

In the present study, composites were prepared by Hand lay-up molding The composites constituents were epoxy resin as a matrix, 6% volume fractions of Glass Fibers (G.F) as reinforcement and 3%, 6% volume fractions of preparation industrial powder (calcium carbonate CaCO3, potassium carbonate K2CO3 or sodium carbonate Na2CO3) as filler. The erosion wear behavior and coating by natural wastes (Rice Husk Ash) with epoxy resin after erosion were studied. The results showed that the non – reinforced epoxy have lower resistance erosion than industrial based Material composites and the specimen (Epoxy+6%glass fiber+6% CaCO3) has higher resistance erosion than composites reinforced with sodium carbonate and potassium carbonate at 25cm, angle 30°, grin size of sand 850µm, temperature 25Ċ, 200 gm salt content in 3liter of water and 15 hour. Coating specimen with mixed epoxy resin -RHA with particles size in the range (1.4-4.2) µm improves erosion wear resistance characteristics of the coated specimen, coating thickness was (16 ± 1) μm and after erosion in (15 hours) the thickness was (10) μm .Application of the work protection of pipes from erosion, these pipes include the sewage water , drainage pipe laboratory (hot water, chemicals and mineral oil) , pipeline transportation of petroleum products and pipeline transportation of gas products

Effect of Nature Materials Powders on Mechanical and Physical Properties of Glass Fiber / Epoxy Composite

Aseel Basim Abdul-Hussein; Emad Saadi AL-Hassani; Reem Alaa Mohammed

Engineering and Technology Journal, 2015, Volume 33, Issue 1, Pages 175-197

In the present study composites were prepared by Hand lay-up molding. The composites constituents were epoxy resin as the matrix, 6% volume fractions of Glass Fibers (G.F) as reinforcement and 3%, 6% of nature material (Rice Husk Ash, Carrot Powder, and Sawdust) as filler. Density, water absorption, hardness test, flexural strength, shear stress measurements and tests were conducted to reveal their values for each type of composite. True density results had shown an incremental increase with volume fraction increasing and water absorption, hardness, flexural strength and shear stress results had shown an incremental increase with volume fraction increasing with smaller particle size.

Study the Effect of Volume Fraction of Mica With Different Particle Size on the Mechanical and Electrical Properties for Unsaturated Polyester Composites

Rafah A.Nasif

Engineering and Technology Journal, 2012, Volume 30, Issue 20, Pages 3573-3580

This study was carried out to investigate the effect of adding mica (5, 10, 15, 20, 25
% vf) with variable particle size (35, 57, 70μm) on the mechanical and electrical
properties of the unsaturated polyester composites. Some mechanical tests were carried
out like (impact strength, flexural strength) and dielectric strength. Flexural strength
and dielectric strength were found to increase with filler concentrations whereas impact
strength was found to decrease at higher concentrations for all particle size.

Effect of Chemical Treatment on The Some Electrical And Thermal Properties For Unsaturated Polyester Composites Using Banana Fibers

Rafah A. Nassif

Engineering and Technology Journal, 2010, Volume 28, Issue 10, Pages 1991-1996

This study was carried out to investigate the effect of the chemical
treatment of banana fibers on the physical properties of composites. Banana fibers
were treated with 10% sodium hydroxide and some physical tests were carried out
like: dielectric strength, dielectric constant, and thermal conductivity. The results
were compared with untreated fibers composites and virgin unsaturated polyester.
The results showed that the chemical treatment improved the dielectric strength
and thermal conductivity by about 29.37% and 139% respectively compared with
untreated fiber composites. Finally, the dielectric constant value of the treated
fiber composite was found to be lower than the untreated fiber composite and
virgin unsaturated polyester.

Mechanical Properties of The Modified Al-12%Si Alloy Reinforced by Ceramic Particles

Haitham Razouqi Saleh

Engineering and Technology Journal, 2010, Volume 28, Issue 2, Pages 289-300

The aluminum alloys are important in many industrial applications
because of their light weight and good mechanical properties. For this reason
many researches had been done to enhance their properties. In this work a
modifier was applied to Al-12%Si alloys by adding different percentage of
Antimony powder (0.1, 0.2, 0.3, 0.4 and 0.5 Wt %). The mechanical properties of
the modified alloys were considered. The optimum properties were found by
adding 0.3% Antimony powder. This alloy was used as the matrix for the
production of composite material (aluminum matrix reinforced by ceramic
particles (Y2O3) with different weight percent (3,6,9 and 12%Wt)) using vortex
technique. The casting parameters were 3 minute as a mixing time and 300 r.p.m
as a mixing speed. The microstructure, hardness and wear test were applied on the
modified alloy and composite materials. The effect of the addition of Antimony
and reinforcement particles on the microstructure, hardness and wear rate of the
composite material were considered. The results show that the addition of
Antimony leads to the microstructure refinement and change the silicon shape in
the alloy from the flake – like or lamellar – like to fibrous – like In addition to the
increasing the hardness when Sb is up to 0.3%, after that the hardness will
decrease, as well as the addition of ceramic particles increase the hardness and
d e c r e a se the wear rate.

Numerical Study of Forced Convection in Wavy and Diverged-Converged Ducts

Anmar M. Basheer; Sattar J. Habeeb; Waheed S. Mohamad; Qutaiba G. Majeed; Mohammed Y. Fattah; Jawad K.Oleiwi; Mohammed S. Hamza; Mayyadah Sh. Abed; Amjed J. Hamidi; Ahmed Alaa Ogla; Yaser Nabeel Ibrahem

Engineering and Technology Journal, 2009, Volume 27, Issue 7, Pages 1385-1403

A three-dimensional study of developing fluid flow and heat transfer through
wavy and diverged-converged ducts were studied numerically for a Prandlt number 0.7
and 5.85 and compared with flow through corresponding straight duct. The Navier-
Stokes and energy equations are solved by using control finite volume method.
Development of the Nusselt number in wavy and diverged-converged ducts are
presented for different flow rates (50

Keywords

forced convection
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numerical study
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wavy duct
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diverged-converged duct

A study of the Hardness and Wear Rate of Elastomer Composites Reinforced by Al2O3 and SiO2 Particles

Jawad K.Oleiwi; Mohammed S. Hamza; Mayyadah Sh. Abed

Engineering and Technology Journal, 2009, Volume 27, Issue 7, Pages 1422-1434

This research deals with the study the effect of adding the silica particles and
alumina particles separately with different ratio (5, 10, 15, 20, and 25 pphr) on the
hardness and wear rate of natural rubber NR and styrene butadiene rubber SBR. The
results show that the hardness increases with the increase the loading level of reinforcing
particles, while the wear rate decreases with the increase the loading level of the
reinforcing particles. The largest value of the hardness and the lowest value of the wear
rate were for styrene butadiene reinforced with 25 pphr of silica as compared with
natural rubber. Also the reinforcing by SiO2 increases the hardness and decreases the
wear rate more than of Al2O3.
The results indicated that the hardness and the wear rate for SBR and NR
reinforced by SiO2 and Al2O3 at (25 pphr) illustrated in the following table:

Using of Taguchi Method to Optimize the Casting of Al–Si /Al2O3 Composites

Osama S. Muhammed; Haitham R. Saleh; Hussam L. Alwan

Engineering and Technology Journal, 2009, Volume 27, Issue 6, Pages 1143-1150

Taguchi method is a problem – solving tool which can improve the performance
of the product, process design and system. This method combines the experimental and
analytical concepts to determine the most influential parameter on the result response for
the significant improvement in the overall performance. In this research Al–Si /Al2O3
composites was prepared by vortex technique using three different parameters, stirring
time, stirring speed, and volume fraction of the reinforcement particles. A tensile and
hardness tests were done for the resulted castings. The primary objective is to use
Taguchi method for predicting the better parameters that give the highest tensile strength
and hardness to the castings, and then preparing composites at these parameters and
comparing them with the randomly used once. The experimental and analytical results
showed that the Taguchi method was successful in predicting the parameters that give
the highest properties and the volume fraction was the most influential parameter on the
tensile strength and hardness results of castings