research centers


Search results: Found 2

Listing 1 - 2 of 2
Sort by

Article
Wear and mechanical properties of epoxy/MgO-SiO2 hybrid nanocomposites
البلى والخصائص الميكانيكية لمتراكبات Epoxy/MgO-SiO2النانومترية الهجينة

Authors: Maryam Zuhair Abd-Ulwahid مريم زهير عبد الواحد --- Khalid R. Al-Rawi خالد رشاد عبد الله الراوي
Journal: Iraqi Journal of Physics المجلة العراقية للفيزياء ISSN: 20704003 Year: 2015 Volume: 13 Issue: 26 Pages: 58-63
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Preparation of epoxy/MgO and epoxy/SiO2 nanocomposites is studding. The nano composites were processed by different nano fillers concentrations (0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.07 and 0.1 wt%). Epoxy resin and nanocomposites containing different shape nano fillers of (MgO:SiO2 composites), are shear mixing with ratio 1:1,with different nano hybrid fillers concentrations (0.025, 0.05, 0.1, 0.15, 0.2 and 0.25 wt%) to preparation of epoxy/(MgO-SiO2) hybrid nanocomposites. Experimental tests results indicate that the composite materials have significantly higher modulus of elasticity than the matrix material but the hybrid nanocomposites have lower modulus of elasticity. The wear rate was decreased in nanocomposites and hybrid nanocomposites than the matrix material and fatigue resistance was increased in nanocomposites and hybrid nanocomposites than the matrix material.

تم دراسة تأثير إضافة كل من أوكسيد المغنيسيوم النانوي وثاني أوكسيد السيلكا النانوي على الخصائص الميكانيكية وبنسب وزنية مختلفة هي 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.07 and 0.1 wt%).). راتنج الأيبوكسي والمركب النانوي يحتويان أشكال مختلفة من الدقائق النانوية (متراكبات Mgo: SiO2), وتم إعتماد التركيب الهجيني بنسبة 1:1 وبنسب وزنية مختلفة (0.025,0.05,0.1,0.15,0.2 and 0.25%). نتائج الأختبارات التجريبية تشير الى ان المواد المركبة لديها أعلى بكثير من معامل المرونة للمادة الأساس, ولكن المتراكب الهجيني لها معامل مرونة أقل من معامل المرونة للمادة الأساس. وقد أنخفض معدل البلى في المركبات النانوية والمواد المتراكبة الهجينة عن معدل البلى للمادة الأساس ومقاومة الكلال تزداد في المواد المركبة والمواد المتراكبة الهجينة عن مقاومة الكلال للمادة الأساس.


Article
Estimation of the Rock Mechanical Properties Using Conventional Log Data in North Rumaila Field

Authors: N. Jasim Al-Ameri نغم جاسم --- Wafa Al-Kattan
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2012 Volume: 13 Issue: 4 Pages: 27-33
Publisher: Baghdad University جامعة بغداد

Loading...
Loading...
Abstract

Hydrocarbon production might cause changes in dynamic reservoir properties. Thus the consideration of the mechanical stability of a formation under different conditions of drilling or production is a very important issue, and basic mechanical properties of the formation should be determined.There is considerable evidence, gathered from laboratory measurements in the field of Rock Mechanics, showing a good correlation between intrinsic rock strength and the dynamic elastic constant determined from sonic-velocity and density measurements.The values of the mechanical properties determined from log data, such as the dynamic elastic constants derived from the measurement of the elastic wave velocities in the material, should be more accurate than that determined by direct strength tests with core samples. This can be attributed to the scale effect and sampling disturbances.The aim of this study was to present methods of determining measures of some mechanical properties, from available well log data (conventional sonic, density, and gamma ray) for a well in North Rumaila field.The mechanical properties include formation strength and Poisson’s ratio. For the formation strength, combined elastic modulus (Ec) and shear modulus (G) were determined. The Poisson’s ratio was determined by using three different techniques to permit the accuracy of their values. The elastic modulus, shear modulus, and Poisson’s ratio were then correlated with depth and effective stress.The results show that combined correlations are important source of the prediction of overpressure zones which represent a major problem encountered in drilling and production process.

Listing 1 - 2 of 2
Sort by
Narrow your search

Resource type

article (2)


Language

English (2)


Year
From To Submit

2015 (1)

2012 (1)