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TECHNICAL PAPERS

Viscoplastic Collapse of Thin-Walled Tubes Under Cyclic Bending

[+] Author and Article Information
Wen-Fung Pan, Yung-Shun Her

Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan, 701, R.O.C

J. Eng. Mater. Technol 120(4), 287-290 (Oct 01, 1998) (4 pages) doi:10.1115/1.2807015 History: Received December 15, 1997; Revised May 07, 1998; Online November 27, 2007

Abstract

This paper presents the experimental result on the response and stability of thin-walled tubes subjected to cyclic bending with different curvature-rates. The curvature-ovalization measurement apparatus, designed by Pan et al. (1998), was used for conducting the present curvature-controlled experiments on thin-walled tubular specimens of 304 stainless steel. It is observed that the higher the applied curvature-rate, the greater is the degree of hardening of metal tube. However, the ovalization of tube cross-section increases when the applied curvature-rate increases. Furthermore, due to the higher degree of the ovalization of tube cross-section for higher curvature-rates under cyclic bending, the number of cycles to produce buckling is correspondingly reduced.

Copyright © 1998 by The American Society of Mechanical Engineers
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