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Studies on Onset of Ratcheting in Pipe Bends

[+] Author Affiliations
K. Shanmuga Sundaram, G. Thanigaiyarasu, Manoj Kumar Palaniswamy

Anna University, Chennai, India

Paper No. DETC2005-85187, pp. 697-704; 8 pages
doi:10.1115/DETC2005-85187
From:
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4c: 18th Reliability, Stress Analysis, and Failure Prevention Conference
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4741-1 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME

abstract

This paper intends to provide an overview of various possibilities of ratcheting in pipelines subjected to cyclic thermal and mechanical loadings. The present work deals with review on results from the studies of research papers providing experimental data and analytical study on ratcheting. There has been no well-defined material model and analysis procedure to predict this phenomenon accurately. An analysis carried out on 2-inch NPS SS304 pipe bends with different thickness (Schedule 40 and Schedule 80) using ABAQUS, non-linear FEA software to predict the strain accumulation and their influences on ratcheting failure is presented. Also, a theoretical analysis to identify the onset of ratcheting in pipe bends using the modified equation of Edmunds and Beer is presented. The results and their inferences are included.

Copyright © 2005 by ASME
Topics: Pipe bends

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