Universiti Teknologi Malaysia Institutional Repository

Effect of autofrettage on allowable pressure of thick-walled cylinders

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.

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Abstract

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.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:thick-walled cylinders
Divisions:Mechanical Engineering
ID Code:45780
Deposited By: Haliza Zainal
Deposited On:10 Jun 2015 03:01
Last Modified:30 Aug 2017 01:51

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