The Bauschinger Effect in Autofrettaged Tubes- A Comparison of Models Including the ASME Code

Abstract

Autofrettage is used to introduce advantageous residual stresses into pressure vessels and to enhance their fatigue lifetimes. For many years workers have acknowledged the probable influence of the Bauschinger effect which serves to reduce the yield strength in compression as a result of prior tensile plastic overload. This in turn can produce lower compressive residual hoop stresses near the bore than are predicted by ideal' solutions (elastic/perfectly plastic without Bauschinger effect). here have been several models proposed in order to predict the reduced stresses within the autofrettaged tube. The purpose of this paper is imply to compare a limited set of models, including the ASME code, with available experimental evidence. Three models are compared: Model A, based upon a quasi strain-hardening model developed by Chen; Model B, based upon a Bauschinger effect which varies with plastic train and hence with radius; Model C, which is based upon section KD-522.2 of the recently revised ASME pressure vessel code.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1998
Accession Number
ADA349152

Entities

People

  • Anthony P. Parker
  • John H. Underwood

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Autofrettage
  • Bending Moments
  • Engineering
  • Experimental Data
  • Ferrium
  • Hardening
  • Measurement
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Pressure Vessels
  • Residual Stress
  • Strain Hardening
  • Stress Strain Relations
  • Stresses
  • X-Ray Diffraction
  • Yield Strength

Readers

  • Computational Modeling and Simulation
  • Materials Science (Mechanical Engineering).
  • Mechanical Engineering/Mechanics of Materials.