Residual stresses calculation in autofrettage using variable material properties method
Book
·
OSTI ID:403200
- Univ. of Waterloo, Ontario (Canada). Mechanical Engineering Dept.
Autofrettaged cylinders are used for variety of applications in chemical and nuclear industries where large internal pressures have to be withstood. Autofrettage is in the process by which beneficial residual stresses are introduced into thick-walled tubes by initially subjected the tube to high internal pressure which causes inelastic deformation. Here, the variable material properties method is employed to obtain elastic-plastic analysis of an autofrettaged tube. This method develops inelastic solution from the elastic solution by treating the material properties as field variables. The distribution of these parameters are obtained in an iterative manner as a part of the solution. An energy based scheme is used to update these variables. The residual stress field of autofrettaged tubes based on the actual material curve and isotropic and kinematic hardening models are obtained. The results are shown to be in good agreement with the published experimental and finite element results.
- OSTI ID:
- 403200
- Report Number(s):
- CONF-960706--; ISBN 0-7918-1774-1
- Country of Publication:
- United States
- Language:
- English
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