Optimum Design of Autofrettaged Thick-Walled Cylinders

Optimum Design of Autofrettaged Thick-Walled Cylinders

Md. Tanjin Amin

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Dr. Abu Rayhan Md. Ali

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Tousif Ahmed

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Faisal Ahmed

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Bangladesh University of Engineering and Technology

Optimum Design of Autofrettaged Thick-Walled Cylinders

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Abstract

The effect of autofrettage process on thick-walled cylinders has been investigated here. It is observed that flow stress distribution along the cylinders remains same for same k values. Comparison with Zhu & Yang’s model has been also done in determination of optimum elasto-plastic radius, r opt and optimum autofrettage pressure, p opt . Equivalent von Mises stress is used as yield criterion. It is observed that percentage of reduction of maximum von Mises stress increases as value of k and working pressure increases. Maximum von Mises stress is minimum for lower working pressure at same value of k and autofrettage pressure. Autofrettage process never starts if autofrettage pressure does not exceed working pressure. It is also observed that two limits of autofrettage pressure Py1 & Py2 are not appropriate. Effect of loading stages on autofrettage process is also investigated. As long as the pressures in first and last stage remains constant, there is no effect of loading stages on autofrettage process; no matters how many stages prevails between these two pressures.

References

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Md. Tanjin Amin. 2013. \u201cOptimum Design of Autofrettaged Thick-Walled Cylinders\u201d. Global Journal of Research in Engineering - A : Mechanical & Mechanics GJRE-A Volume 13 (GJRE Volume 13 Issue A8): .

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GJRE Volume 13 Issue A8
Pg. 1- 7

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

Keywords

autofrettage elasto-plastic junction pressure vessel residual stress von mises stress working pressure

Submission ReceivedDecember 12, 2012
Peer Review Double Blind
Handling Editor
Accepted January 3, 2013
Published January 15, 2013

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November 16, 2013

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Article Matrices

Total Score: 109

Country: Bangladesh

Subject: Global Journal of Research in Engineering - A : Mechanical & Mechanics

Authors: Md. Tanjin Amin, Dr. Abu Rayhan Md. Ali, Tousif Ahmed, Faisal Ahmed (PhD/Dr. count: 1)

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Publish Date: 2013 11, Sat

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Total Downloads: 2434

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