Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

The Overstrain of Thick-Walled Cylinders Considering the Bauschinger Effect Facto. (BEF)

  • Ghorbanpour, A. (Department of Mechanical Engineering, University of kashan) ;
  • Loghman, A. (Department of Mechanical Engineering, University, of kashan) ;
  • Khademizadeh, H. (Department of Mechanical Engineering, Isfahan University of technology) ;
  • Moradi, M. (Department of Mechanical Engineering, Isfahan University of technology)
  • Published : 2003.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

An independent kinematic hardening material model in which the reverse yielding point is defined by the Bauschinger effect factor (BEF) , has been defined for stainless steel SUS 304. The material model and the BEF are obtained experimentally and represented mathematically as continuous functions of effective plastic strain. The material model has been incorporated in a non-linear stress analysis for the prediction of reverse yielding in thick-walled cylinders during the autofrettage process of these vessels. Residual stress distributions of the independent kinematic hardening material model at the onset of reverse yielding are compared with residual stresses of an isotropic hardening model showing the significant effect of the BEF on reverse yielding predictions. Critical pressures of direct and reverse yielding are obtained for the most commonly used cylinders and a range of permissible internal pressures for an efficient autofrettaged process is recommended.

Keywords

References

  1. ANSYS 5.0, 1992, ANSYS User's Manual for Revision 5.0 Theory Swanson Analysis Systems, Inc. Houston, USA
  2. Bland, D. R., 1956, Elastoplastic Thick-Walled Tubes of Work-Hardening Material Subject to Internal and External Pressure and Temperature Gradients. J. Mech. Phys. Solid, Vol. 4, pp. 209-229 https://doi.org/10.1016/0022-5096(56)90030-8
  3. Chen, P. C. T., 1986, The Bauschinger and Hardening Effect of Residual Stresses in an Autofrettaged Thick-Walled Cylinder. ASME Journal of Pressure Vessel Technology, Vol. 108, pp. 108-112
  4. Loghman, A. and Wahab, M. A., 1994, Loading and Unloading of Thick-Walled Cylindrical Pressure Vessels of Strain Hardening Material. ASME Journal of Pressure Vessel Technology, Vol. 116, pp. 105-109
  5. Milligan, R. V., Koo, W. H. and Davidson, T. E., 1996, The Bauschinger Effect in a High Strength Steel. ASME Journal of Basic Engineering, pp. 480-488
  6. Ress, D. W. A., 1987, A Theory of Autofrettage With Application to Creep and Fatigue. Int. J. Pres. Ves. & Piping, Vol. 30, pp. 57-76 https://doi.org/10.1016/0308-0161(87)90093-7