Piercing of Cylindrical Tubes

[+] Author and Article Information
W. Johnson, S. K. Ghosh

Department of Engineering, University of Cambridge, Cambridge, England

S. R. Reid

Department of Engineering, University of Aberdeen, Aberdeen, Scotland; Department of Engineering, University of Cambridge, Cambridge, England

J. Pressure Vessel Technol 103(3), 255-260 (Aug 01, 1981) (6 pages) doi:10.1115/1.3263399 History: Received July 25, 1980; Revised March 09, 1981; Online November 05, 2009


Experiments are described in which cylindrical tubes were perforated normally at their central section. Quasi-static tests were performed using mainly square-section punches possessing pointed pyramidal heads of semi-angle 30 deg, the tubes being supported along their support generator. The dynamic tests comprised high-speed penetration of tubes using conically headed cylindrical projectiles. The equipment and experimental procedures are briefly described and results are presented showing typical punch load-penetration curves, the variation of punch load with tube length and that of a nondimensional characteristic punch load (defined later) with length-to-diameter ratio of the tubes. Typical specimens and the sequence of events during the course of a penetration process are also illustrated. The characteristics of petalling and plugging modes of failure together with those effects which are specifically dynamic in character are reported.

Copyright © 1981 by ASME
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