Drilling tests were conducted on aramid and carbon fiber-reinforced composite laminates using an instrumented machining center. Machining parameters for the damage-free drilling of these materials were established together with semi-empirical relationships between drilling forces and cutting parameters. The drilling force responses as a function of various feed rates and drill sizes were characterized to define the key process stages taking place during a drilling cycle. Using a previously established delamination-based criterion for initiating damage during drilling, the critical feed rate for damage-free drilling was established for the two composite material types: aramid and carbon fiber-reinforced polymer laminates. Independent measurements of the opening-mode delamination crack energy release rates were conducted on both materials to determine the critical thrust force for damage initiation. This study establishes the key process stages exhibited by carbon and aramid fiber composites during drilling, the critical threshold feed rates to avoid damage, and machining relations that can be utilized for the design of intelligent controllers for efficient drilling of composite laminates.
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November 2002
Technical Papers
Drilling of Aramid and Carbon Fiber Polymer Composites
M. S. Won,
M. S. Won
Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740
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C. K. H. Dharan
C. K. H. Dharan
Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740
Search for other works by this author on:
M. S. Won
Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740
C. K. H. Dharan
Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720-1740
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received March 2000; Revised September 2001. Associate Editor. K. Ehmann.
J. Manuf. Sci. Eng. Nov 2002, 124(4): 778-783 (6 pages)
Published Online: October 23, 2002
Article history
Received:
March 1, 2000
Revised:
September 1, 2001
Online:
October 23, 2002
Citation
Won , M. S., and Dharan , C. K. H. (October 23, 2002). "Drilling of Aramid and Carbon Fiber Polymer Composites ." ASME. J. Manuf. Sci. Eng. November 2002; 124(4): 778–783. https://doi.org/10.1115/1.1505854
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