Engineering Commons^™

Fracture Behavior Of Cracked Full Scale Steel Pipes Used For Gas And Petroleum Industries, Jaafer Altarawneh

Theses

The fracture toughness of pipeline steel grade X65 was investigated utilizing linear elastic fracture mechanics analysis, K_IC testing according to non-standards techniques, as well as the elastic-plastic fracture mechanics analysis (J-Integral and crack opening displacement COD methods). The fracture toughness tests were conducted at full scale pipe used for gas and oil industry, circumferential surface crack were introduced to nine pipe specimens with different depths, crack/notch depths were selected to cover wide range of remaining material of the original pipe thickness, the original pipe thickness remain unchanged, a special fixture was manufactured to perform the experimental works, plane strain …

Impact Characteristics Of Nano Composites, Ammar Mohamed Al Omari

Theses

Nanocomposite materials have seen a significant increase in use and have created a revolution in high-performance structures. They exploit the properties of different materials which create structures that are stronger, stiffer, impact resistant and more durable against environmental factors. They can be tailored to have better electric, magnetic, optical properties, and be chemically, thermally and explosion resistant depending on the application. The current research study investigates the impact characteristics of polymeric based nanaocomposites strengthened with various types of nano and micro filler. An in-house designed impact testing machine was utilized to typify the impact characteristics of different nanocomposite materials through …

Recovery Of Carbon Dioxide From Flue Gases, Fahad Husain Al-Masabi

Theses

In this thesis, the modeling and simulation of the absorption of dilute CO₂ into falling film of aqueous solutions of a sterically hindered amine, 2-anino-2-methyl-1-propanol (AMP), was carried out using COMSOL Multiphysics Version 3.3. The operating cases were divided in two groups: (1) gas turbine operating cases (CO₂ 3 mol %) and (II) boiler operating cases (CO₂ 8.5 mol %). The key operating parameters for the studied cases are CO₂ partial pressure, operating temperature and amine concentration in the aqueous solution. The simulation focused on the following: (1) CO₂ Loading in aqueous AMP solution; (2) …

Fabrication Of Polymeric Hollow Fiber Membrane For The Production Of Safe Drinking Water, Latifa Obeid Hamad Al-Nuaimi

Theses

Production of safe drinking water by using micro-filtration and ultra-filtration technologies has become more interesting. Water purification or filtration by using membrane began attracting much attention worldwide, because of its good characteristics such as: high efficiency in removing solid particles, viruses and germs and their low cost. This new technology is useful in industrial water treatment. The current studies in this field of polymer membrane manufacturing try to improve the characteristics, water flow rater and remove unwanted particles from water.

The recent project’s aim is to manufacture cellulose acetate hollow fibers. They were prepared by the Non Solvent Induced Phase …

Performance Of Reinforced Concrete Columns Strengthened With Fiber Reinforced Polymers Under Various Loading Conditions, Mohamed Gamal Mohamed El Sayed

Theses

Strengthening of reinforced concrete (RC) structures with Carbon Fiber Reinforced Polymer (CFRP) composites has been a popular subject that attracted considerable attention from researchers for the last two decades. The high specific strength, stiffness, environmental resistance, and ease of application make CFRP composites highly desirable for strengthening and rehabilitation of RC structural components.

For concentrically loaded RC members with a circular cross-section, the lateral CFRP-confinement of concrete results in a substantial increase in load capacity and ductility. CFRP-confinement is less effective for RC compression members with square and rectangular cross-sections due to stress concentration at the corners and lack of …