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Effect of autofrettage on allowable pressure of thick-walled cylinders

In optimal design of thick-walled cylinders, there are two main objectives to be achieved: increasing its strength-weight ratio and extending its fatigue life. This can be achieved by generating a residual stress field in the cylinder wall prior to use. In the present study, the objective is to pres...

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Main Authors: Wahi, Noraziah, Ayob, Amran, Elbasheer, Mohd. Kabashi
Format: Conference or Workshop Item
Published: 2011
Online Access:http://eprints.utm.my/id/eprint/45780/
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spelling my.utm.457802017-08-30T01:51:20Z http://eprints.utm.my/id/eprint/45780/ Effect of autofrettage on allowable pressure of thick-walled cylinders Wahi, Noraziah Ayob, Amran Elbasheer, Mohd. Kabashi In optimal design of thick-walled cylinders, there are two main objectives to be achieved: increasing its strength-weight ratio and extending its fatigue life. This can be achieved by generating a residual stress field in the cylinder wall prior to use. In the present study, the objective is to present an analytical autofrettage procedure, with the aim of predicting the required autofrettage pressure for various levels of allowable pressure. The results could contribute to a better understanding of the role autofrettage plays in providing strength and performance in pressure vessels. A corresponding FEM validation will be provided. The results reveal three scenarios in the design of thick-walled cylinders. For maximum load carrying capacity, non-autofrettage is suitable when, in service, the whole wall thickness is intended to be yielded. Full autofrettage is suitable when, during subsequent operation, yielding is limited at the inner surface. Optimum autofrettage of the cylinder is suitable if a minimum equivalent stress is required. 2011 Conference or Workshop Item PeerReviewed Wahi, Noraziah and Ayob, Amran and Elbasheer, Mohd. Kabashi (2011) Effect of autofrettage on allowable pressure of thick-walled cylinders. In: International Conference On Environmental And Agriculture Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
description In optimal design of thick-walled cylinders, there are two main objectives to be achieved: increasing its strength-weight ratio and extending its fatigue life. This can be achieved by generating a residual stress field in the cylinder wall prior to use. In the present study, the objective is to present an analytical autofrettage procedure, with the aim of predicting the required autofrettage pressure for various levels of allowable pressure. The results could contribute to a better understanding of the role autofrettage plays in providing strength and performance in pressure vessels. A corresponding FEM validation will be provided. The results reveal three scenarios in the design of thick-walled cylinders. For maximum load carrying capacity, non-autofrettage is suitable when, in service, the whole wall thickness is intended to be yielded. Full autofrettage is suitable when, during subsequent operation, yielding is limited at the inner surface. Optimum autofrettage of the cylinder is suitable if a minimum equivalent stress is required.
format Conference or Workshop Item
author Wahi, Noraziah
Ayob, Amran
Elbasheer, Mohd. Kabashi
spellingShingle Wahi, Noraziah
Ayob, Amran
Elbasheer, Mohd. Kabashi
Effect of autofrettage on allowable pressure of thick-walled cylinders
author_facet Wahi, Noraziah
Ayob, Amran
Elbasheer, Mohd. Kabashi
author_sort Wahi, Noraziah
title Effect of autofrettage on allowable pressure of thick-walled cylinders
title_short Effect of autofrettage on allowable pressure of thick-walled cylinders
title_full Effect of autofrettage on allowable pressure of thick-walled cylinders
title_fullStr Effect of autofrettage on allowable pressure of thick-walled cylinders
title_full_unstemmed Effect of autofrettage on allowable pressure of thick-walled cylinders
title_sort effect of autofrettage on allowable pressure of thick-walled cylinders
publishDate 2011
url http://eprints.utm.my/id/eprint/45780/
_version_ 1643651841530003456
score 13.211869

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