Li Li

Publication Date

1993

Document Type

Dissertation/Thesis

First Advisor

Majumdar, Pradip, 1954-

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Mechanical Engineering

LCSH

Cutting; Lasers in engineering; Finite element method; Gaussian beams

Abstract

The formation of a deep groove by evaporation on a semi-infinite solid is considered. Evaporation removal of material is achieved by focusing a high- power, highly concentrated Gaussian laser beam of constant wattage (CW laser) onto the surface of the solid. A numerical solution for the temperature profile in the solid with an exponentially decaying source and convective boundary condition is obtained using a 3-D Finite Element Method. The appropriate dimensionless parameters (B[sub i], N[sub k], N[sub e], U) are identified and the temperature on slab is presented in those parameters. The results for the groove depth and shape are presented for a variety of laser and solid parameters.

Comments

Includes bibliographical references (pages [55]-56)

Extent

viii, 56 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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