Analysis of delamination in drilling composite materials using core drill

Abstract

Delamination is one of the serious concerns during drilling. This paper presents a comprehensive analysis of delamination when using core drill. The critical thrust force at the onset of delamination is predicted and compared with a twist drill. The well known advantage of industrial use of a core drill is fundamentally illustrated. A guide for drill design can be developed based on the proposed models, and this approach can be extended to examine the effects of other special drill designs.

Keywords:

• Drilling
• Delamination
• Thrust Force
• Core Drill
• Composite Materials

Additional information

Notes on contributors

H Ho-Cheng

Hong Ho-cheng was born in 1958. He obtained his B. Sc. from National Taiwan University, Taiwan, in 1980, and later his Diplom-Ingenieur from Technische Hochschule Aachen, Germany. He received Ph. D. from University of California, Berkeley, in 1988. Presently Dr. Ho-cheng is professor at National Tsing Hua University. His fields of interest are innovative manufacturing processes.

C C Tsao

Chung-Chen Tsao was born in 1959. He obtained his B.Sc. and M.Sc. in mechanical engineering from National Taiwan University of Science and Technology, Taiwan in 1987 and 1989. Presently he is an assistant professor at Tahua Institute of Technology. His major research field is manufacturing processes and automatic control.