Affordable Access

Publisher Website

Residual stress analyses of re-autofrettaged thick-walled tubes

Authors
Journal
International Journal of Pressure Vessels and Piping
0308-0161
Publisher
Elsevier
Volume
98
Identifiers
DOI: 10.1016/j.ijpvp.2012.07.007
Keywords
  • Re-Autofrettage Process
  • Nonlinear Kinematic Hardening
  • First Stress Invariant
  • Lode Angle Parameter
  • Residual Stress Distribution

Abstract

Abstract In this paper the effect of the re-autofrettage process on the residual stress distribution at the wall of a thick-walled tube is considered. For accurate material behavior modeling, it is assumed that the yield surface is a function of all the stress invariants. Also for estimating the behavior of the material under loading–unloading process, a modified Chaboche's hardening model is applied. For evaluation of this unloading behavior model a series of loading–unloading tests are conducted on specimens that are made of the high strength steel, DIN1.6959. In addition the finite element simulations are implemented to simulate the re-autofrettage process and to estimate the residual stresses. The numerical results show that the re-autofrettage process without heat treatment only improves the residual stress distribution in high autofrettage percentage and for low autofrettage percentage this method is not beneficial. However, the re-autofrettage process with ‘‘heat soak’’ treatment generally improves the residual stress distribution.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Reconstruction of residual stresses in autofrettag...

on International Journal of Press... Jan 01, 2009

Residual stress analysis of autofrettaged thick-wa...

on International Journal of Press... Jan 01, 2010

Determination of residual stresses in autofrettage...

on Materials Science and Engineer... Jan 01, 1986

Axial curvature and residual stress measurement in...

on International Journal of Mecha... Jan 01, 1968
More articles like this..