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Applied Mechanics Commons

Open Access. Powered by Scholars. Published by Universities.®

2005

Mechanical engineering

Articles 1 - 2 of 2

Full-Text Articles in Applied Mechanics

Fatigue Life Investigation Of Solid And Hollow Rollers In Pure Rolling Contact , Wisam M. Abu Jadayil Jan 2005

Fatigue Life Investigation Of Solid And Hollow Rollers In Pure Rolling Contact , Wisam M. Abu Jadayil

Retrospective Theses and Dissertations

Solid and hollow cylindrical rollers in pure rolling contact have been modeled using the finite element package, ABAQUS, to study the stress distribution and the resulting deformations in the rollers' bodies when the two rollers are subjected to a pure normal loading or to a combined normal and tangential loading. The tangential loading is one third of the normal loading value. Then the Ioannides-Harris fatigue life model for rolling bearings has been applied on the ABAQUS numerical results to investigate the fatigue life of the solid and hollow rollers. Using the fatigue life of the solid rollers as the reference ...


Synergy Between Chemical Dissolution And Mechanical Abrasion During Chemical Mechanical Polishing Of Copper , Wei Che Jan 2005

Synergy Between Chemical Dissolution And Mechanical Abrasion During Chemical Mechanical Polishing Of Copper , Wei Che

Retrospective Theses and Dissertations

Chemical mechanical planarization (CMP) is a mainstream semiconductor processing method for achieving local and global wafer planarization. However, the CMP process fundamentals are poorly understood, and thereby inhibit migratability of lab-scale experiments to production processes. This work addresses the synergistic role of chemical dissolution rate (CDR) and mechanical abrasion rate (MAR) on the material removal mechanisms during CMP process.;A set of nano-wear experiments on elecro-plated copper surfaces are conducted with systematic exposure to active slurry. Initial results of in situ wear test in chemically active slurry showed an increased material removal rate (MRR) relative to a dry wear test ...