Optimum Design of Autofrettaged Thick-Walled Cylinders

Md. Tanjin Amin; Dr. Abu Rayhan Md. Ali; Tousif Ahmed

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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Bangladeah 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

10 Cites in Article

Reference Format

T Blazinski (1983). Applied elasto-plasticity of solids.
Gh Majzoobi,A Farrahi,Mahmoudi (2003). A finite element simulation and an experimental study of autofrettage for strain hardened thick-walled cylinders.
Pct,Chen (1986). Stress and deformation analysis of autofrettaged high pressure vessels.
G Franklin,Jlm Morrison (1960). Autofrettage of Cylinders: Prediction of Pressure/External Expansion Curves and Calculation of Residual Stresses.
Rayhan Abu,Nidul Ali,Ch,Ghosh,-E-Alam Tanvir (2010). Optimum Design of Pressure Vessel Subjected to Autofrettage Process.
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F Kong (1986). Determining the optimum radius of the elastic-plastic juncture for thick-walled autofrettage cylinder by graphic method.
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A Ghomi (2005). Optimum Design of Thick-walled Pressure Cylinders (in Persian), MS.c final project.

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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. Amin, Dr. Ali, Tousif Ahmed. 2013. "Optimum Design of Autofrettaged Thick-Walled Cylinders". Global Journal of Research in Engineering, 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

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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

Classification

GJRE-A Classification FOR Code: 290501p

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

Version of record

v1.2

Issue date

November 16, 2013

Language

English

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Article Matrices

Total Score: 109

Country: Bangladesh

Subject: Global Journal of Research in Engineering

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

View Count (all-time): 371

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Publish Date: 2013 01, Tue

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