Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : composite


Study the Tensile Characteristics of Elastomer Composites Reinforced with Alumina and Precipitated Silica Particles

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

Engineering and Technology Journal, 2015, Volume 33, Issue 5, Pages 1079-1094

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.

Mechanical Properties For Pipes Made From Composite Materials (Glass/ Epoxy And Carbon/ Epoxy) Subjected To Internal Pressure

Zainab K. Hantoosh; Hatam Kareem Kadhom; Aseel Jasim Mohammed

Engineering and Technology Journal, 2012, Volume 30, Issue 6, Pages 117-134

Composite Materials have been used extensively in application such as pipes and pressure vessels. Therefore it is important for further studies on the properties of these materials. This paper presents the results from a series of tensile tests on the mechanical properties of composite materials. Specimens cut from pipes made from composite materials were tested under internal pressure loadings have been tested by using a series of ASTM Standards test methods for mechanical properties. Based on the results obtained, the longitudinal E11,
transverse E22 and shear modulus G12 of 101.2 GPa, 5.718 GPa, 4.346 GPa and 36.6, 5.4 GPa, 4.085 GPa for carbon and glass fiber/ epoxy composites, respectively, while the ultimate longitudinal XL, transverse XT and shear tensile τ0 strengths of 1475.4 MPa, 20 MPa, 36 MPa and 618.9 MPa, 14 MPa, 28 MPa for carbon and glass fiber/epoxy composites, respectively. The results from this series of tests have been presented and compared with results from analytical equations. Good agreement was achieved between the experimental results and
analytical results.

Study Some Physical and Mechanical Properties of Ceramic – Ceramic Fibers Composite

Fadhil Attiya Chyad

Engineering and Technology Journal, 2011, Volume 29, Issue 9, Pages 1631-1640

Zirconia fibers have been prepared by convertional method using cotton threads
impregrated in zirconium oxychloride solution ( ZrOCl2. 8H2O ). X-ray
diffraction shows the crystallinity of zirconia and optical microscopy shows the
fibers fabrication. Differnet percentage ( 2 ,4 ,8 , 10 and 12 ) of prepared zirconia
fibers mixed with ZnO powder.
All the specmen sintered at 1250 °C for 2hrs. Physical properties (density and
volume shrinkage) were measured and Mechanicl properties (Vicker ̉s
hardness,fracture strength and fracture toughness by indentation method ) were
calculated, 10% of fiber content has the maximum values for these properties for
the composite.

Tensile and Buckling Analysis of the Polymer Composite Beam Reinforced by Natural Jute Fiber

Mohamad Ali Tariq; Qahtan Adnan Hamad; Mohamad K. Alwan

Engineering and Technology Journal, 2011, Volume 29, Issue 1, Pages 129-140

This research focuses on the preparation of polymer matrix composite
material by (hand lay – UP) method, where the material was prepared from
unsaturated polyester resin (up) as a matrix reinforced by natural jute fiber with
different volume fractions (3%, 4%, 5%, 6%).The experimental work and finite
element techniques were used to analysis the tensile and the buckling analysis of
the composite beam reinforced by natural jute fiber at different volume fraction.
The results of experimental work of the modulus of elasticity were in the
range of the theoretical results. The critical load increased with increase the fiber
volume fraction that ( cr P =610N) at ( f V = 3%) and ( cr P =830N) at ( f V =6 %) for
the experimental results.While ( cr P =619N) at ( f V = 3%) and ( cr P =877N) at
( f V =6 %) for the finite element results.

Finite Element Analysis Up To Failure Of Composite Concrete – Corrugated Steel Cylindrical Shells

Ahmed T. Mahdi; Eyad K. Sayhood; Husain M. Husain

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 2339-2351

This study presents three-dimensional finite element analysis to the behavior of composite concrete-corrugated steel cylindrical shell. This type of construction utilizes the advantages of both of ordinary reinforced concrete and the composite action of cylindrical shell with corrugated steel plates. The 8-node brick elements in (ANSYS v.9.0) have been used to represent the concrete, while the steel bars
are modeled as discrete axial members connected with concrete elements at shared nodes with the assumption of prefect bond between the concrete and the steel bars. The corrugated steel plate is modeled by four-node shell elements. The interface elements are modeled by using three-dimensional surface to surface contact elements connected with the nodes of concrete and steel channel elements. Comparison is made between the results obtained from the finite element analysis and the available experimental results of previous studies

Effect of Dual Reinforcement on Wear Resistance by Aluminum Compacts Reinforce by SiC, Al2O3

Mohammed Moanes Ezzaldean Ali; Hanan A. R. Akkar; A. K. M. AL-Shaikhli; Ali K. Shayyish; Muhsin J. Jweeg; Wisam Auday Hussain; Mohammed T. Hussein; Mohammad A. Al-Neami; Farah S. Al-Jabary; Jafar M. Hassan; Ali H. Tarrad; Mohammed N. Abdullah; Ahmed T. Mahdi; Eyad K. Sayhood; Husain M. Husain; Nidaa F. Hassan; Rehab F. Hassan; Akbas E. Ali; Assim H Yousif; Kassim K Abbas; Aqeel M Jary; Shakir A. Salih; Ali T. Jasim; Ammar A. Ali; Hosham Salim; JafarM. Daif; Ali H. Al Aboodi; Ammar S. Dawood; Sarmad A. Abbas; Salah Mahdi Saleh; Roshen T. Ahmed; Aseel B. Al-Zubaidi; Mohammed Y. Hassan; Majid A. Oleiwi; Shaimaa Mahmood Mahdy; Husain M. Husain; Mohammed J. Hamood; Shaima; a Tariq Sakin

Engineering and Technology Journal, 2009, Volume 27, Issue 13, Pages 423-429

The producing composite materials of dual reinforcement in which the matrix material is aluminum reinforced with two types of ceramic particles : which are Alumina (50μm

Keywords

composite materials; wear test ; Al2O3; SiC: Al