Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Glass

Effect of Different Fiber Reinforcements on Some Properties of Prosthetic Socket

Noor K. Faheed; Jawad K. Oleiwi; Qahtan A. Hamad

Engineering and Technology Journal, 2021, Volume 39, Issue 11, Pages 1715-1726
DOI: 10.30684/etj.v39i11.2267

In the perspective of environmental advance, significant attentiveness is being displayed in the usage of natural fibers like reinforcement in polymer composites. This paper focuses on building a prosthetic socket arranged from natural fiber-reinforced composite as an effort to substitute material currently accessible in the manufacturing of the socket. The vacuum bagging procedure was adopted to yield a below-knee socket. The laminates encompass woven flax, sisal, cotton, carbon, person, and glass fabric. The impact of diverse fiber layering sequences on some of the physical and mechanical characteristics was assessed. Laminated specimens were characterized by tests such as (hardness, surface roughness, density, water absorption). The results of this study showed that consuming altered forms of reinforcing materials had an abundant influence on the properties of prepared composite and the values of (hardness, surface roughness, and density) properties improved with increasing of the volume fraction of materials and the best composite specimens were three layers of flax with two layers of carbon fiber, were the hardness property ranges 86 MPa and density of (1.276 gm. /cm3) due to their exceptional mechanical properties. The results of the present study advocate that the arrangement of natural and synthetic reinforcements allows the preparation of bio-composites with enhanced performance.

A Comparative Investigation on Mechanical Properties of Various Fibers Reinforced Concrete

Ahmed M. Al-Ghaban; Hussein A. Jaber; Aya A. Shaher

Engineering and Technology Journal, 2019, Volume 37, Issue 1A, Pages 28-36
DOI: 10.30684/etj.37.1A.5

The present work presents an investigation the effect of adding various fiber materials such as (glass, nylon, and carbon) into the concrete mix for inspecting and compare the mechanical properties of different fibers reinforced concrete. Two different fiber length states of (short=3cm and long=10cm) are used in this work. The concrete of ordinary Portland cement of (1:1.5:3), (cement: sand: gravel), were mixed with each of the fiber materials at four different weight percentages (0, 0.4, 0.8, and 1.2) wt% per cement content. Compressive strength and flexural strength were experimentally investigated of different fibers reinforced concrete specimens after curing for 28 days. The results showed that the incorporation of various fibers with the concrete mix generally improved the strength of concrete by improving the toughness. The flexural strength of concrete with addition of various fibers was strongly enhanced than compression. Addition 0.8% of nylon fiber to concrete resulted in the maximum increase of its compressive strength, reaching the rate of increasing to 11.08% for short fiber and 20.75% for long fiber. Addition 1.2% of nylon fiber to concrete mix resulted in the maximum increase of the flexural strength, reaching rate of increasing to 120.02% for short fiber and 211.49% for long fiber. Increasing the length of fibers increases the strength of the concrete but a little extent. Among these fibers, nylon containing concrete composite exhibits promising mechanical strength that could be easily used as low-cost partitioning wall, false ceiling, and other household purposes.

Improvement the Chemical Resistance of Furnaces Bricks for Petroleum Refineries by ZrO2-Nano- Glass-Ceramic Coated

S.A. Zaidan; H. Y. Abed

Engineering and Technology Journal, 2017, Volume 35, Issue 10, Pages 999-1002

Partial Stabilized Zirconia (PSZ) was prepared from adding 3 wt % of MgO or adding 8 wt% of Y2O3 to 90 wt % ZrO2 Powder and mixed by wet method, then dried and firing mixture to 1500C to obtain PSZ ceramic powder. Glass-Ceramic (Li2SiO3) and (LiAlO2) prepared by dissolve lithium carbonate and lithium hydroxide with Nano-Silica (SiO2) and Nano-Alumina (Al2O3) respectively. Those glass-ceramic mixed with PSZ in different percentage (2.5,5,7.5,10) and sprayed on furnaces bricks for petroleum refineries. An increase in the chemical resistance of the acid on the surface of the Refractory bricks was observed when coating with the glass-ceramic mixture, as well as increasing the hardness and thermal shock resistance. Lithium silicate coated specimens are more spared and homogeneous on the surface compared to lithium laminate coated.

Application of Taguchi Approache to Study the Effect of Filler Type on Tribological Behavior of Polymer Composite Under Dry Conditions

Drai Ahmed Smait; Farag Mahel Mohammed; Hussam Lefta Alwan

Engineering and Technology Journal, 2014, Volume 32, Issue 8, Pages 1916-1930

The tribological behaviour of a G-P ( glass-polyester ) composite system and G-P composite systems interfaced with graded fillers were tested. The composite materials of G-P and G-P reinforced with SiC and Graphite particles as secondary fillers were experimentally investigated under varying loads, sliding velocities with dry surfaces by using a Pin-on-Disc test machine. A plan of experiments, based on the techniques of Taguchi, were performed to acquire data in a controlled way. An L9 Orthogonal array was selected for analysis of the data. Investigations to find the influence of additives, applied load, sliding speed on wear rate, wear resistance as well as the coefficient of friction during wearing process were carried out using ANOVA analysis and regression equation for each response. The model was chosen as "smaller is better" characteristics to analyse the dry sliding wear and friction while "larger is better" for sliding wear resistance. Results show that the additives have the highest influence followed by load and sliding speed. Finally, confirmation tests were performed to verify the experimental results foreseen from the mentioned correlations

The Effect of Pure Aluminum Weight Percent on Different Properties of a New Cermet Material Made of Al-Machinable Glass Ceramic

a Abdul-Hassan Khalaf; Bayda

Engineering and Technology Journal, 2011, Volume 29, Issue 4, Pages 805-813

In this research high pure aluminum metal with the following weight percent
(1,2,3,4,5) has been added to machinable glass-ceramic, after the preparation of the
samples by pressing then firing the effect of this addition on the density, hardness,
young modulus, and polishing and grinding time of the machinable glass-ceramic
have been studied. It has been found that the increasing in aluminum percent lead to
slightly increase in density while the hardness, young modulus, and polishing and
grinding time decreased.