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TECHNICAL PAPERS

The Importance of Material Structure in the Laser Cutting of Glass Fiber Reinforced Plastic Composites

[+] Author and Article Information
G. Caprino

Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli, P.le Tecchio 80, 80125 Napoli, Italy

V. Tagliaferri

Istituto di Ingegneria Meccanica, Università di Salerno, Via Ponte Don Melillo, Fisciano, 84084 Salerno, Italy

L. Covelli

IMU-Consiglio Nazionale delle Ricerche, Via Ampère, 56, 20135 Milano, Italy

J. Eng. Mater. Technol 117(1), 133-138 (Jan 01, 1995) (6 pages) doi:10.1115/1.2804364 History: Received December 23, 1992; Revised December 21, 1993; Online November 27, 2007

Abstract

A previously proposed micromechanical formula, aiming to predict the vaporization energy Qv of composite materials as a function of fiber and matrix properties and fiber volume ratio, was assessed. The experimental data, obtained on glass fiber reinforced plastic panels with different fiber contents cut by a medium power CO2 cw laser, were treated according to a procedure previously suggested, in order to evaluate Qv . An excellent agreement was found between experimental and theoretical Qv values. Theory was then used to predict the response to laser cutting of a composite material with a fiber content varying along the thickness. The theoretical predictions indicated that, in this case, the interpretation of the experimental results may be misleading, bringing to errors in the evaluation of the material thermal properties, or in the prediction of the kerf depth. Some experimental data were obtained, confirming the theoretical findings.

Copyright © 1995 by The American Society of Mechanical Engineers
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