Residual Elastic Strains in Autofrettaged Tubes: Elastic–Ideally Plastic Model AnalysisSource: Journal of Engineering Materials and Technology:;2007:;volume( 129 ):;issue: 001::page 77Author:Alexander M. Korsunsky
DOI: 10.1115/1.2400267Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Autofrettage is a treatment process that uses plastic deformation to create a state of permanent residual stress within thick-walled tubes by pressurizing them beyond the elastic limit. The present paper presents explicit analytical formulas for residual elastic strains within the tube wall derived on the basis of the classical elastic–ideally plastic solution. Then the problem is addressed of rational interpretation of the radial and hoop residual elastic strains measured at a fixed number of points. To this end, the mismatch between the experimental measurements and theoretical predictions of the residual elastic strains is represented in the form of quadratic functional, J, the minimum of which is sought in terms of the problem parameters, namely, the material yield stress, σY, and the radial position of the elastic-plastic boundary, c. It is shown that J shows an approximately parabolic variation in terms of either parameter when the other is fixed, and that therefore the global minimum of J can be readily found. This procedure is implemented and applied to a set of experimental data on neutron diffraction measurements (2000, J. Strain Anal., 35, pp. 459–469). In conclusion, further applications of this family of interpretation approaches are discussed.
keyword(s): Stress , Formulas , Inverse problems , Neutron diffraction , Yield stress , Autofrettage , Deformation , Measurement , Pressure AND Residual stresses ,
|
Collections
Show full item record
contributor author | Alexander M. Korsunsky | |
date accessioned | 2017-05-09T00:23:57Z | |
date available | 2017-05-09T00:23:57Z | |
date copyright | January, 2007 | |
date issued | 2007 | |
identifier issn | 0094-4289 | |
identifier other | JEMTA8-27092#77_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/135872 | |
description abstract | Autofrettage is a treatment process that uses plastic deformation to create a state of permanent residual stress within thick-walled tubes by pressurizing them beyond the elastic limit. The present paper presents explicit analytical formulas for residual elastic strains within the tube wall derived on the basis of the classical elastic–ideally plastic solution. Then the problem is addressed of rational interpretation of the radial and hoop residual elastic strains measured at a fixed number of points. To this end, the mismatch between the experimental measurements and theoretical predictions of the residual elastic strains is represented in the form of quadratic functional, J, the minimum of which is sought in terms of the problem parameters, namely, the material yield stress, σY, and the radial position of the elastic-plastic boundary, c. It is shown that J shows an approximately parabolic variation in terms of either parameter when the other is fixed, and that therefore the global minimum of J can be readily found. This procedure is implemented and applied to a set of experimental data on neutron diffraction measurements (2000, J. Strain Anal., 35, pp. 459–469). In conclusion, further applications of this family of interpretation approaches are discussed. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Residual Elastic Strains in Autofrettaged Tubes: Elastic–Ideally Plastic Model Analysis | |
type | Journal Paper | |
journal volume | 129 | |
journal issue | 1 | |
journal title | Journal of Engineering Materials and Technology | |
identifier doi | 10.1115/1.2400267 | |
journal fristpage | 77 | |
journal lastpage | 81 | |
identifier eissn | 1528-8889 | |
keywords | Stress | |
keywords | Formulas | |
keywords | Inverse problems | |
keywords | Neutron diffraction | |
keywords | Yield stress | |
keywords | Autofrettage | |
keywords | Deformation | |
keywords | Measurement | |
keywords | Pressure AND Residual stresses | |
tree | Journal of Engineering Materials and Technology:;2007:;volume( 129 ):;issue: 001 | |
contenttype | Fulltext |