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Article
Study the Effect of Iron Powder Additives on Mechanical properties of Recycling of Aluminum Cans Scrap

Author: Jawad. k. Oleiwi
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 5 Part (A) Engineering Pages: 830-838
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper involves the effect of iron powder in recycling of aluminum cans scrap on some mechanical properties. This process includes burning aluminum cans to remove paint and shredding into small pieces then melting aluminum pieces using an electrical furnace at (750 ºC). Iron powder (0.6, 1.2 and 1.8 wt %) was added to the melt sequentially. The composition is then casted into cylinder steel molds. The mechanical and metallurgical characteristics of the fabricated alloys were studied through an optical microscope including hardness, tensile testing, scanning electronic microscope and X-ray fluorescence. The results indicated that the maximum value of tensile strength and elongation percentage are recorded for the addition of (1.2%) of Iron powder. While maximum modulus of elasticity reported was at (0.6%) Iron powder cast. Hardness also increased with the increase of Iron additives.


Article
Development the Physical Properties of Polymeric Blend (SR/ PMMA) by Adding various Types of Nanoparticles, Used for Maxillofacial Prosthesis Applications

Authors: Sihama I. Salih --- Jawad K. Oleiwi
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2019 Volume: 37 Issue: 4part (A) Engineering Pages: 120-127
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

As maxillofacial defects increased due to cancer; it becamenecessary to select high-quality prosthetic materials in this field. Siliconerubber is widely used in damaged maxillofacial affected areas replacementsurgery as bio material. The aim of this research, prepared a nano compositesmaterials, from polymer blend (silicone rubber: 5% PMMA) reinforced bydifferent types of nano-powders; pomegranate Peels Powder (PPP), Seedspowder of dates Ajwa (SPDA) and TiO2 nano-powders with loading level (0.0,0.1, 0.2, 0.3 and 0.4%). Some physical properties such as density, waterabsorption, and Thermo-Physical test, FTIR analysis, as well as, FTIR,antibacterial tests were done on prepared samples. The results showed thatthe composites material based of polymer blend with optimum percent are of0.2% of pomegranate Peels Powder (PPP), 0.3% of Seeds powder of datesAjwa (SPDA) and 0.1% of TiO2 nano-powders that have ideal characteristic.Also for antibacterial tests, polymeric blend composites with optimum percentof this nano-powders show that more antibacterial efficiency against S.aureusbacteria than E.coli bacteria.


Article
A Study of The Effect of Carbon Black Powder on The Physical Properties of SBR/NR Blends Used In Passenger Tire Treads
دراسة تأثير أضافة الكاربون الاسود على خصائص الفيزياوية لخلائط المطاط (SBRINR) المستخدمة في نفس الأطار

Authors: Jawad K.Oleiwi --- Mohammed S. Hamza --- Nassier A. Nassir
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 5 Pages: 856-870
Publisher: University of Technology الجامعة التكنولوجية

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Abstract


Article
A study of the Hardness and Wear Rate of Elastomer Composites Reinforced by Al2O3 and SiO2 Particles
دراسة الصلادة و معدل البلى لمتراكب مطاطي مقوى بدقائق من SiO3 و 2 Al2O

Authors: Jawad K.Oleiwi --- Mohammed S. Hamza --- Mayyadah Sh. Abed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2009 Volume: 27 Issue: 7 Pages: 1422-1434
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

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

تناول هذا البحث دراسة تاثير اضافة دقائق السليكا و الالومين ا بصورة منفصلة و بنسب مختلفة5) على الصلادة و معدل البلى للمطاط الطبيعي و مطاط الستايرين - , 10, 15, 20, and 25 pphr)بيوتادايين. بينت النتائج بان الصلادة تزداد مع زيادة نسب اضافة مادة التقوية , بينما معدل البلى يقل معزيادة نسب اضافة مادة التقوية . حيث ان اعلى قيم للصلادة و اقل معدل بلى تم الحصول عليه هما25 ) مقارنة بالمطاط الطبيعي . pphr) للمطاط الستايرين- بيوتادايين المقوى بدقائق السليكا بنسبةوكذلك عند التقوية بدقائق السليك ا يقل معدل البلى اكثر مم ا عليه عند التقوية بدقائق الالومين ا. حيثالمقوى بدقائق السليكا و الالومينا بنسبة SBR و المطاط NR بلغت قيم الصلادة و معدل البلى للمطاط25 ) موضحة بالجدول التالي: pphr)

Keywords

Elastomer --- Composites --- Hardness --- Wear Rate


Article
Numerically and Theoretically Studying of the Upper Composite Complete Prosthetic Denture
دراسة تحليلية ونظرية لطقم الاسنان الاصطناعي الكامل المتراكب العلوي

Authors: Sihama I. Salih --- Jawad K. Oleiwi --- Qahtan A. Hamad
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2015 Volume: 33 Issue: 5 Part (A) Engineering Pages: 1023-1037
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The current study focused on the manufacturing and development properties of upper prosthesis complete denture from composite materials with the basis cold cured resin of poly methyl methacrylate as new fluid resin and reinforced materials by two different types of particles (nano-hydroxyapatite (nHA), micro zirconia (ZrO2)), that added with different volume fractions of (1%, 2% and 3%), and the different types of woven fibers (Glass fiber, Kevlar fiber), it were added with a fixed volume fraction of (5%) to PMMA composites.Specimens’ consist of a six groups where prepared by using (Hand Lay-Up) method from the composites materials and hybrid laminated composites materials. This research includes theoretical and numerical studies by using finite element method to confirming the experimental results of the effect of selected volume fractions of theseparticles and fibers on the (total deformation distribution, equivalent elastic strain and equivalent Von Mises stress) of the composite prosthetic dentures.The theoretical part included calculations the values of theoretical safety factor and Poisson's ratio. While the numerical part based on finite element method (F.E.M), which was performed by using program (ANSYS-15) to analyze the prepared of denture composite materials and evaluate its characteristics which represent total deformation distribution, equivalent stress and equivalent elastic strain. This was performed by obtaining twenty one models for the PMMA composite dental prostheses which were treated as three dimension structure. The numerical results of the F.E.A showed coincided with some of the experimental results.

في هذا البحث تم التركيز على تصنيعوتطوير مواصفات طقم أسنان أصطناعي كامل علوي من مواد متراكبة. وقد حضرت هذه المواد المتراكبة من راتنج البولي مثيل ميثا اكريليت على شكل راتنج سائل جديد معالج ذاتياً كمادة أساس وقد تم تقويتها بنوعين مختلفين من الدقائق تضمنت دقائق الهيدروكسي اباتايت النانوية ودقائق الزركونيا الميكروية تم اضافتهما بكسور حجمية مختلفة هي (1%, 2% and 3%)، ونوعين مختلفين من الالياف الحصيرية الثنائية الاتجاه هي الياف الزجاج والياف الكفلر والتي تمت اضافتها الى المواد المتراكبةبكسر حجمي ثابت هو (%5)الى المواد المتراكبة. تتكون العينات من ستة مجاميع تم تحضيرها باستخدام طريقة الصب اليدوي تمثل مواد متراكبة ومواد متراكبة طبائقية هجينية. تضمن البحث دراسة نظرية وتحليلية باستخدام طريقة العناصر المحددة للتاكد من النتائج العمليةلتأثير الكسور الحجمية المختارة لهذه الألياف والدقائق على (توزيع التشوه الكلي، الانفعال المرن المكافيء والاجهاد المكافيء) لأطقام الاسنان الأصطناعية المتراكبة.تضمنتنتائج الجانب النظري حساب قيم معامل الامان النظريونسبة بويزن. أما الجانب التحليلي فيتضمن أستخدام أستخدام طريقة العناصر المحددة والتي أنجزت بأستخدام برنامج(ANSYS-15) لغرض تحليل المواد المتراكبة المحضرة لطقم الأسنان وحساب خصائصه والتي تمثل (توزيع التشوه الكلي، الاجهاد المكافيء والانفعال المرن المكافيء)، وقد تم انجاز ذلك عن طريق الحصول على واحد وعشرون موديل لطقم الاسنان الأصطناعي باعتبارها أطقام أسنان متراكبة مكونة من راتنج البولي مثيل ميثا اكريليت ذات هيكل ثلاثي الابعاد، وقد أظهرت النتائج التحليلية لطريقة العناصر المحددة تطابق مع بعض النتائج العملية.


Article
Study the Tensile Characteristics of Elastomer Composites Reinforced with Alumina and Precipitated Silica Particles
دراسة خصائص الشد لمتراكب مطاطي مقوى بدقائق من الالومينا والسليكا المترسبة كيميائيا

Authors: Jawad K. Oleiwi --- Mohammed S. Hamza --- Mayyadah S. Abed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2015 Volume: 33 Issue: 5 Part (A) Engineering Pages: 1079-1094
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Styrene butadiene rubber (SBR) and natural rubber (NR) composites reinforced with alumina (Al2O3) and precipitated silica (SiO2)particles had been prepared separately by calendaring process.It had been studied the adding effect of the alumina and silica particlesseparately at different ratio (5, 10, 15, 20, and 25 pphr٭) on the tensile characteristics ofnatural rubber NR and styrene butadiene rubber SBR. The results show that the tensilecharacteristics increase with the increase loading level of the both reinforcing particles.The maximum values of the tensile characteristics were for natural rubber as comparedwith styrene butadiene rubber, and the reinforcing effect of silica particles higher than of alumina.The results indicate that the maximum tensile strength at break, modulus of elasticity, and elongation percentage at break were (70MPa, 18, 350%) respectively for natural rubber reinforced with(25 pphr) of SiO2.


Article
Comparing Effect of Adding LDPE, PP, PMMA on The Mechanical Properties of Polystyrene (PS)
مقارنة تاثير اضافة البولي اثلين منخفض الكثافة و البولي بروبلين و البولي مثيل ميثا اكريللك على الخواص الميكانيكية للبولي ستايرين

Authors: Sihama E. Salih --- Jawad K. Oleiwi --- Rawaa A. Abdle Ameer
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2015 Volume: 33 Issue: 6 Part (A) Engineering Pages: 1450-1461
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this research three groups of polymer blends have been prepared First groupincluded (Polystyrene (PS): Low density polyethylene (LDPE))While the Second group(included Polystyrene (PS): Polypropylene (PP)) and Third groups include (Polystyrene (PS): Poly methel methacrylate(PMMA)) are prepared in different ratios by melt blending technique which was carried out using a double screw extruder. The tensile, flexural, impact and hardness test are used to study mechanical propertiesof polymer blends. The results from this work show that the impact properties for blends system increases with increases each of (LDPE, PP and PMMA) content in polymer blends of (PS: LDPE), (PS: PP) and (PS: PMMA). The elongation property increases with increases LDPE and PP but decreases when adding PMMA in polymer blend.

في البحث المنجز تم تحضير ثلاث مجاميع من الخلائط البوليمرية حيث ان المجموعة الاولى تتضمن (PS:LDPE) بينما المجموعة الثانية( (PS:PP و المجموعة الثالثة تشمل ((PS:PMMAتم تحضيرها بنسب مختلفة باستعمال الباثقة ثنائيه اللولب .تم اجراء فحص الشد والانحناء والصدمة والصلادة لدراسة الخواص الميكانيكية للخلائط البوليمرية نتائج هذا البحث بينت بان خواص الصدمة للخلائط تزداد مع زيادة نسبة محتوى كل من ال(LDPE, PP, PMMA) في الخلائط البوليمرية , (PS:PP), (PS:PMMA) ((PS:LDPE. نسبة الاستطالة تزداد مع زيادة LDPE, PPولكن تقل عندما نضيف PMMA الى الخليط البوليمري.

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Article
Physical and Mechanical Properties Estimation of Ti/HAP Functionally Graded Material Using Artificial Neural Network

Authors: Jawad K. Oleiwi --- Rana A. Anaee --- Sura A. Muhsin
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 12 Part (A) Engineering Pages: 2174-2180
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This study presents the effort in applying neural network-based system identification techniques by using Back- propagation algorithm to predict somephysical mechanical properties of functionally graded and compositesamples from Ti/HAP, these samples were fabricated by powder metallurgy method at various volume fraction of hydroxyapatite and at n equal (0.8, 1, and 1.2). Because of important of advanced materials such as FGMs as alternative industrial material, it is necessary to measure the physical properties of these materials such as porosity, density, hardness, compression …etc. Therefore the ANN will be used to estimate these properties and give a good performance to the network.

Keywords

Ti/HAP --- ANN --- FGM --- Physical properties


Article
Effect of Water Absorption on the Compressive Strength for PMMA Nano Composites and PMMA Hybrids Nano Composites Reinforced by Different Nanoparticles Used in Dental Applications

Authors: Sihama E. Salih --- Jawad K. Oleiwi --- Alaa Mohammed.T
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 14 Part (A) Engineering Pages: 2654-2669
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Poly methyl methacrylate (PMMA), are widely used as a prosthodontic denture base, the denture base materials should exhibit good mechanical properties and dimensional stability in moist environment. In the present research, efforts were made to develop the properties of PMMA resin that used for upper and lower prosthesis complete denture, by addition four different types of nanoparticles, which are fly ash, fly dust, zirconia and aluminum that added with different ratios of volume fractions of (1%, 2% and 3%) to poly methyl methacrylate (PMMA), cold cured resin (castavaria) is the new fluid resin (pour type) as a matrix. In this work, the Nano composite and hybrid Nano composite for prosthetic dentures specimens, preparation was done by using (Hand Lay-Up) method as six groups which includes: the first three groups consists of PMMA resin reinforced by fly ash , fly dust and ZrO2 nanoparticles respectively, the second three groups consists of three types of hybrid Nano composites, which includes ((PMMA:X% fly ash)+ (1%Al + 3% ZrO2 )), ((PMMA:X% fly dust)+ (1%Al + 3% ZrO2)) and ((PMMA:X%nZrO2)+(1%fly ash+3%fly dust)) respectively. As well as, the effect of water absorption was taking into consideration in this study. The compression test results show that the values of the compressive strength with and without the effect of water absorption increased with the addition of Nano powders (fly ash, fly dust, zirconia, and aluminum). Also, the results showed that the maximum values of compressive strength reach to 286.25MPa for (PMMA: 2%nZrO2) Nano composite. Whereas the maximum values of compressive strength for hybrid Nano composite reach to 270MPa for ((PMMA: 2%fly ash) + (1%Al + 3% ZrO2)) hybrid Nano composite. Moreover, the results showed that the maximum value of compressive strength under the effect of water absorption reach to 335MPa in the Nano composite material (PMMA+2% fly dust), whereas the maximum value of compressive strength under the effect of water absorption for hybrid Nano composite reach to 362MPa for ((PMMA: 2% fly dust) + (1%Al + 3% ZrO2)) hybrid Nano composite.


Article
Investigation of Hardness and Flexural Properties of PMMA Nano Composites and PMMA Hybrids Nano Composites Reinforced by Different Nano Particles Materials used in Dental Applications

Authors: Sihama E. Salih --- Jawad K. Oleiwi --- Alaa Mohammed.T
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 15 Part (A) Engineering Pages: 2838-2853
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Poly methyl methacrylate (PMMA), widely used as a prosthodontic denture base, the denture base materials should exhibit good mechanical properties and dimensional stability in moist environment. In the present research, efforts are made to develop the properties of PMMA resin that used for upper and lower prosthesis complete denture, by addition four different types of nanoparticles, which are fly ash, fly dust, zirconia and aluminum that added with different ratios of volume fractions of (1%, 2% and 3%) to poly methyl methacrylate (PMMA), cold cured resin (castavaria) is the new fluid resin (pour type) as a matrix. In this work, the Nano composite and hybrid Nano composite for prosthetic dentures specimens, preparation was done by using (Hand Lay-Up) method as six groups which includes: the first three groups consists of PMMA resin reinforced by fly ash , fly dust and ZrO2 nanoparticles respectively, the second three groups consists of three types of hybrid Nano composites, which includes ((PMMA: X% nF.A)+ (1%Al + 3% ZrO2)), ((PMMA: X% nD.A)+ (1%Al + 3% ZrO2)) and ((PMMA - X%nZrO2)+(1%F.A + 3%F.D)) respectively. The hardness and flexural tests results show that the values of the hardness, flexural strength, Maximum shear stress and flexural modules increased and with the addition of Nano powders (fly ash, fly dust, zirconia, and aluminum). And the results showed that the maximum values of hardness reach to (84.166) for ((PMMA: 3%nZrO2) + (1%F.A + 3%F.D)) hybrid Nano composite, whereas the maximum values of hardness for Nano composite reach to (83.333) for (PMMA: 3%nZrO2) Nano composite. Also, the results showed that the maximum values of flexural strength and Maximum shear stress reaches to (101MPa) and (2.4738MPa) respectively for (PMMA: 2%nF.D) Nano composite. Moreover, the results showed that the maximum values of flexural modules reaches to (13.95GPa) for ((PMMA: 3% nF.A) + (1%Al + 3%ZrO2)) hybrid Nano composite, whereas the maximum values of flexural modules for Nano composite reach to (12GPa) for (PMMA-3%nZrO2) Nano composite.

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