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Theses/Dissertations

2004

Materials Science and Engineering

Articles 61 - 62 of 62

Full-Text Articles in Engineering

The Role Of The Solid Substrate On The Spreading Kinetics Of A Liquid Droplet, Bashar Jalal Sasa Jan 2004

The Role Of The Solid Substrate On The Spreading Kinetics Of A Liquid Droplet, Bashar Jalal Sasa

Theses

Classic hydrodynamic wetting theory leads to a linear relationship between spreading speed and the capillary force, being determined only by the surface tension of the liquid and its viscosity.

The theory appears in good agreement with results generated from experiments conducted on the spreading of Polydimethylsiloxanes (PDMS) on soda-lime glass substrate and fails to account for the behavior of other liquids. This thesis examines the role played by the solid substrate on the spreading kinetics of liquid droplets. The set of experiments whose results are presented below used different types of liquids with various properties of surface tension and viscosity …


Material Selection For A Composite Hip Joint, Ahmed Abdullah Ali Al-Hosani Jan 2004

Material Selection For A Composite Hip Joint, Ahmed Abdullah Ali Al-Hosani

Theses

The use of biomaterials in orthopedic surgery has been successfully acceptable in the current medical practice. Total hip joint replacement (THR) is one of the most popular and successful operations in orthopedics. Total hip replacement (THR) has been using metal prosthesis for many years. However, the use of metal implants has two major disadvantages. The first disadvantage is that the stiffness of the metallic prosthesis is relatively high compared to the surrounding, load carrying bone. The elastic moduli of titanium and cobalt-chromium alloy are 110 and 210 GPa, respectively. Whereas the elastic modulus of cortical bone ranges from 15 to …