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Effect of Filler Type on some Physical and Mechanical Proparties of Carbon Fibers / Polyester Composites
تأثیر نوع الاضافه على بعض الخواص الفیزیائیه والمیكانیكیه من الیاف كاربون ومتراكبات البولي استر

Authors: Osama Sultan Muhammed --- Abbas Khammas Hussein --- Ruaa Haitham Abdel-Rahim
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2013 Volume: 31 Issue: 15 Part (A) Engineering Pages: 2905-2924
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In the present study, traditional and hybrid composites were prepared by Hand lay-upmolding and investigated. The composites constituents were unsaturated polyester resinas the matrix, 3% and 6% volume fractions of carbon fibers as reinforcement and 3% ofAl2O3, Al, Cement and local Gypsum (calcium sulfate anhydrate CaSO4) as fillerparticles. The investigated physical properties were density, porosity while themechanical properties were tensile properties, bending modulus of elasticity. Theexperimental results showed that increased volume fraction of carbon fibers to (6%) ledto increase in physical properties (density, porosity. As for the mechanical properties,carbon fiber composites and (3% carbon fibers/Al2O3)-contained hybrid composites gavethe higher tensile and fracture strength, carbon fiber then gypsum composites gave thehigher bending modulus.


Article
NUMERICAL AND EXPERIMENTAL STUDY OF BENDING AND TENSILE BEHAVIOR FOR THEALUMINUM –SILICON COMPOSITE BEAM REINFORCED BY ALUMINA

Author: Mohamad K. Alwan
Journal: Iraqi journal of mechanical and material engineering المجلة العراقية للهندسة الميكانيكية وهندسة المواد ISSN: 20761819 Year: 2012 Volume: 12 Issue: 3 Pages: 508-520
Publisher: Babylon University جامعة بابل

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Abstract

This research includes experimental and numerical analysis using finiteelement method by ANSYS11 package to study effect of reinforcement of Aluminum–Silicon with ceramic particles (Alumina) for different beam width (12, 14 and16mm) on the hardiness and bending properties. The composite material is produced using the vortex technique by cutting the base alloy to small pieces and put inside steel crucible. Put the steel crucible inside gas furnace in temperature (700oC). The electrical mixer used to vortex the mixtureand adding the aluminum oxide particles (Alumina) (5% and 10%) and after thatpouring the melting in metallic mold. The results of the study showed that Vickers micro hardness increased from(HV=105) for pure Aluminum –Silicon alloy to (HV=127) with (10%) Alumina, alsothe tensile strength increased from (95 Mpa) to (135 Mpa). The maximum flexuralstrength was (451 MPa) and the maximum shear stress was (33 MPa) at (width=16mm) with volume fraction (10 %) of Alumina. the maximum strain decrease withincrease volume fraction of Alumina. The experimental and finite element resultsobtained are approximately agreement.


Article
Numerically and Experimentally Studying of some Mechanical Properties of the Polyester Matrix Composite Material Reinforced by Jute Fibers
دراسة تحليلية وعملية لبعض الخصائص الميكانيكية لمادة متراكبة ذات أساس من البولي استر مقواة بألياف الجوت

Authors: Jawad Kadhim Oleiwi --- Mohamad K. Alwan --- Qahtan Adnan Hamad
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2014 Volume: 32 Issue: 9 Part (A) Engineering Pages: 2235-2247
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This research focuses on the preparation of polymer matrix composite material by (hand lay – up) method, where the material (rectangular beam) was prepared from unsaturated polyester resin as a matrix reinforced by natural jute fiber with different volume fraction (3%, 4%, 5%, 6%). Numerical studies by using finite element method (Ansys 11 package) to study the effect of selected volume fractions of jute fibers on the bending properties. Results of this experimental research indicate that increasing the volume fraction of jute fibers lead to increase bending modulus of elasticity. The values of flexural strength and shear stress increase with the increase of jute fibers volume fraction while the values of deflection and maximum strain decreases for both experimental and numerical studies.

في هذا البحث تم تحضير مادة متراكبة ذات أساس بوليمري بطريقة الصب اليدوي من البولي استر غير المشبع كمادة أساس مقواة بألياف الجوت الطبيعية وبكسور حجميه مختلفة هي (3%, 4%, 5% و 6%) . تضمن البحث دراسة عملية وتحليلية باستخدام طريقة العناصر المحددة لدراسة تأثير الكسور الحجمية المختارة لألياف الجوت على خصائص الانحناء. أظهرت النتائج العملية للبحث بأن زيادة الكسر ألحجمي لألياف الجوت أدت إلى زيادة قيم معامل مرونة الانحناء.مع زيادة الكسر الحجمي لألياف الجوت, فان قيم متانة الانحناء واقصى إجهاد القص تزداد بينما انخفضت قيم الاستطالة والانفعال الأعظم ولكلا الدراستين العملية والتحليلية.

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