Hostname: page-component-848d4c4894-hfldf Total loading time: 0 Render date: 2024-05-15T07:16:18.624Z Has data issue: false hasContentIssue false
  • English
  • Français

Variation of Ovalization for Sharp-Notched Circular Tubes Under Cyclic Bending

Published online by Cambridge University Press:  05 May 2011

K.-L. Lee ,
C.-Y. Hung  and
W.-F. Pan
K.-L. Lee*
Affiliation:
Department of Computer Application Engineering, Far East University, Tainan, Taiwan 74448, R.O.C.
C.-Y. Hung*
Affiliation:
Department of Mechanical Engineering, Military Academy, Kaohsiung, Taiwan 83059, R.O.C.
W.-F. Pan*
Affiliation:
Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan 70101, R.O.C.
*
* Associate Professor
** Assistant Professor
*** Professor, corresponding author
Get access

Abstract

In this paper, an experimental investigation on the variation of ovalization for sharp-notched circular tubes subjected to cyclic bending is discussed. The tube bending machine and curvature-ovalization measurement apparatus were used to test the unnotched and sharp-notched 304 stainless steel tubes. For sharp-notched tubes, five different notch depths (0.2, 0.4, 0.6, 0.8 and 1.0mm) were considered in this study. It was found that the experimental curve of the ovalization and the number of cycles could be divided into three stages-an initial, secondary and tertiary stage. An empirical relationship was proposed for simulating the aforementioned curve for the initial and secondary stages in this study. It has been shown that the derived empirical relationship was in good agreement with the experimental data.

Keywords

Sharp-notched circular tubesCyclic bendingOvalizationCurvatureNumber of cycles
Type
Articles
Information
Journal of Mechanics , Volume 26 , Issue 3 , September 2010 , pp. 403 - 411
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Kyriakides, S. and Shaw, P. K., “Response and Stability of Elastoplastic Circular Pipes under Combined Bending and External Pressure,” International Journal of Solids and Structures, 18, pp. 957–973 (1982).Google Scholar
2.Shaw, P. K. and Kyriakides, S., “Inelastic Analysis of Thin-Walled Tubes under Cyclic Bending,” International Journal of Solids and Structures, 21, pp. 1073–1110 (1985).Google Scholar
3.Kyriakides, S. and Shaw, P. K., “Inelastic Buckling of Tubes under Cyclic Loads,” Journal of Pressure Vessel and Technology, ASME, 109, pp. 169–178 (1987).Google Scholar
4.Corona, E. and Kyriakides, S., “On the Collapse of Inelastic Tubes under Combined Bending and Pressure,” International Journal of Solids and Structures, 24, pp. 505–535 (1988).Google Scholar
5.Corona, E. and Kyriakides, S., “An Experimental Investigation of the Degradation and Buckling of Circular Tubes under Cyclic Bending and External Pressure,” Thin-Walled Structures, 12, pp. 229–263 (1991).Google Scholar
6.Corona, E. and Vaze, S., “Buckling of Elastic-Plastic Square Tubes under Bending,” International Journal of Mechanical Sciences, 38, pp. 753–775 (1996).Google Scholar
7.Vaze, S. and Corona, E., “Degradation and Collapse of Square Tubes under Cyclic Bending,” Thin-Walled Structures, 31, pp. 325–341 (1998).Google Scholar
8.Pan, W. F., Wang, T. R. and Hsu, C. M., “A Curvature-Ovalization Measurement Apparatus for Circular Tubes under Cyclic Bending,” Experimental Mechanics, 38, pp. 99–102 (1998).Google Scholar
9.Pan, W. F. and Fan, C. H., “An Experimental Study on the Effect of Curvature-Rate at Preloading Stage on Subsequent Creep or Relaxation of Thin-Walled Tubes under Pure Bending,” JSME International Journal, Series A, 41, pp. 525–531 (1998).Google Scholar
10.Pan, W. F. and Her, Y. S., “Viscoplastic Collapse of Thin-Walled Tubes under Cyclic Bending,” Journal of Engineering Materials and Technology, ASME, 120, pp. 287–290 (1998).Google Scholar
11.Lee, K. L., Pan, W. F. and Kuo, J. N., “The Influence of the Diameter-to-Thickness Ratio on the Stability of Circular Tubes under Cyclic Bending,” International Journal of Solids and Structures, 38, pp. 2401–2413 (2001).Google Scholar
12.Lee, K. L., Pan, W. F. and Hsu, C. M., “Experimental and Theoretical Evaluations of the Effect between Diameter-to-Thickness Ratio and Curvature-Rate on the Stability of Circular Tubes under Cyclic Bending,” JSME International Journal, Series A, 47, pp. 212–222 (2004).Google Scholar
13.Chang, K. H.Pan, W. F. and Lee, K. L., “Mean Moment Effect of Thin-Walled Tubes under Cyclic Bending,” Structural Engineering and Mechanics—An International Journal, 28, pp. 495–514 (2008).Google Scholar
14.Elchalakani, M., Zhao, X. L. and Grzebieta, R. H., “Plastic Mechanism Analysis of Circular Tubes under Pure Bending,” International Journal of Mechanical Sciences, 44, pp. 1117–1143 (2002).Google Scholar
15.Jiao, H. and Zhao, X. L., “Section Slenderness Limits of Very High Strength Circular Steel Tubes in Bending,” Thin-Walled Structures, 42, pp. 1257–1271 (2004).Google Scholar
16.Kraus, H., ”Creep Analysis,” Wiley, New York (1980).Google Scholar