The Effect of Thickness Variations on the Behavior of Smooth Curved Pipes Under External Bending

[+] Author and Article Information
J. Spence

Department of Mechanics of Materials, University of Strathclyde, Glasgow, Scotland

G. E. Findlay

Department of Mechanical Engineering, Paisley College of Technology, Paisley, Scotland

J. Pressure Vessel Technol 102(1), 45-48 (Feb 01, 1980) (4 pages) doi:10.1115/1.3263300 History: Received April 05, 1978; Revised March 26, 1979; Online November 05, 2009


By various manufacturing techniques straight pipes with initially circular cross sections can be processed into smooth bends but usually with noncircular cross sections and with variations in thickness. These changes from the ideal are normally referred to as “ovality” and “thinning”; their influence on the subsequent behaviour of curved pipes is not yet fully understood. Here theoretical work on constant thickness circular and elliptical cross sections has been extended to cope with typical variations in thickness. The theory which is based on a classical energy approach is outlined for in-plane bending loading and is easily extended to cover out-of-plane bending. Linear elastic small displacement limitations apply. It is concluded that normally accepted values of thinning have virtually no effect on the flexibility due to bending of smooth pipe bends with or without initial ovality. Similarly, the peak meridional bending stresses were found to be insensitive to thickness variations.

Copyright © 1980 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In