The interest in the use of layered cylinders that combine autofrettage and shrink fit in order to extend fatigue lifetimes is increasing. As the number of layers increases, the sequential order of assembly and the size of each layer become more important. To achieve the most benefical result, a design optimization method is required. In this investigation, the optimum design of a three-layered vessel for maximum fatigue life expectancy under the combined effects of autofrettage and shrink fit has been considered. To obtain optimum size of each layer and to optimize the initial stress distribution, the numerical optimization procedure known as the Simplex search method is employed here. The thickness of each layer, shrink-fit pressures, and autofrettage percentages are treated as design variables. Under stress constraints, the operational sequences for assembly of a layered vessel have been formulated in order to lead to optimum results, defined as maximum life expectancy. The fatigue life consideration is based on ASME code provisions and standards for high pressure vessel technology, which define the allowable final crack depth for multilayer vessels. The proposed procedure has been carried out on a number of examples. The results show that, with proper combination of operations significant life enhancement can be achieved using the optimization procedure.
Skip Nav Destination
e-mail: hjahedmo@uwaterloo.ca
e-mail: farshi@iust.ac.ir
Article navigation
Research Papers
Optimum Autofrettage and Shrink-Fit Combination in Multi-Layer Cylinders
Hamid Jahed,
Hamid Jahed
Mechanical Engineering Department,
e-mail: hjahedmo@uwaterloo.ca
Iran University of Science and Technology
, Tehran, Iran 16844
Search for other works by this author on:
Behrooz Farshi,
Behrooz Farshi
Associate Editor
Mechanical Engineering Department,
e-mail: farshi@iust.ac.ir
Iran University of Science and Technology
, Tehran, Iran 16844
Search for other works by this author on:
Morvarid Karimi
Morvarid Karimi
Mechanical Engineering Department,
Iran University of Science and Technology
, Tehran, Iran 16844
Search for other works by this author on:
Hamid Jahed
Mechanical Engineering Department,
Iran University of Science and Technology
, Tehran, Iran 16844e-mail: hjahedmo@uwaterloo.ca
Behrooz Farshi
Associate Editor
Mechanical Engineering Department,
Iran University of Science and Technology
, Tehran, Iran 16844e-mail: farshi@iust.ac.ir
Morvarid Karimi
Mechanical Engineering Department,
Iran University of Science and Technology
, Tehran, Iran 16844J. Pressure Vessel Technol. May 2006, 128(2): 196-200 (5 pages)
Published Online: December 8, 2005
Article history
Received:
November 27, 2005
Revised:
December 8, 2005
Citation
Jahed, H., Farshi, B., and Karimi, M. (December 8, 2005). "Optimum Autofrettage and Shrink-Fit Combination in Multi-Layer Cylinders." ASME. J. Pressure Vessel Technol. May 2006; 128(2): 196–200. https://doi.org/10.1115/1.2172957
Download citation file:
Get Email Alerts
Surface Strain Measurement for Non-Intrusive Internal Pressure Evaluation of a Cannon
J. Pressure Vessel Technol (December 2024)
Dynamic Response and Damage Analysis of a Large Steel Tank Impacted by an Explosive Fragment
J. Pressure Vessel Technol (February 2025)
Related Articles
A Critical Examination of Sachs’ Material-Removal Method for Determination of Residual Stress
J. Pressure Vessel Technol (May,2004)
The Impact of the Bauschinger Effect on Stress Concentrations and Stress Intensity Factors for Eroded Autofrettaged Thick Cylindrical Pressure Vessels
J. Pressure Vessel Technol (April,2012)
3-D Stress Intensity Factors for Internal Cracks in an Overstrained Cylindrical Pressure Vessel—Part II: The Combined Effect of Pressure and Autofrettage
J. Pressure Vessel Technol (February,2001)
Fatigue Life Prediction of an Autofrettaged Thick-Walled Pressure Vessel With an External Groove
J. Pressure Vessel Technol (August,1991)
Related Chapters
New Guidelines on Assessing the Risk of Fatigue Failure and Remaining Life of Ageing Pressure Vessels:
Ageing and Life Extension of Offshore Facilities
Basic Features
Structural Shear Joints: Analyses, Properties and Design for Repeat Loading
Basic Concepts
Design & Analysis of ASME Boiler and Pressure Vessel Components in the Creep Range