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TECHNICAL BRIEFS

Structural Behavior of a Solid Tubular Under Large Radial Plastic Expansion

[+] Author and Article Information
A. C. Seibi

 Petroleum Institute, Mechanical Engineering, P.O. Box 2533, Abu Dhabi, United Arab Emiratesaseibi@pi.ac.ae

S. Al-Hiddabi

 Sultan Qaboos University, Mechanical and Industrial Engineering, P.O. Box 33, Al-Khod 123, Omanhiddabi@squ.edu.om

T. Pervez

 Sultan Qaboos University, Mechanical and Industrial Engineering, P.O. Box 33, Al-Khod 123, Omanhiddabi@squ.edu.om

J. Energy Resour. Technol 127(4), 323-327 (Dec 01, 2005) (5 pages) doi:10.1115/1.1926309 History:

The theory of metal forming has been used to study the mechanical response of a solid tubular under radial plastic expansion. A mathematical model of an expanded thin walled tube under compression has been developed in this paper. The study showed that as the friction coefficient and mandrel angle increase the drawing force and induced stresses increase. However, the final tube thickness and length were found to decrease with an increase in both parameters.

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Copyright © 2005 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Expansion process of a tubular under compression and stresses on an infinitesimal element

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Figure 2

Drawing force vs expansion ratio for different friction coefficient and fixed cone angle of 20 deg

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Figure 3

Drawing force vs expansion ratio for different cone angles and fixed friction coefficient of 0.4

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Figure 4

Maximum longitudinal stress vs expansion ratio for different friction coefficients at a mandrel angle of 20deg

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Figure 5

Maximum longitudinal stress vs expansion ratio for different cone angles at fixed friction coefficient of 0.4

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Figure 6

Maximum hoop stress vs expansion ratio for different friction coefficients at fixed cone angle of 20deg

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Figure 7

Maximum hoop stress vs expansion ratio for different cone angles at fixed friction coefficient of 0.4

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Figure 8

Length variations vs expansion ratio for different friction coefficients at fixed cone angle of 20deg

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Figure 9

Length variations vs expansion ratio for different cone angles at fixed friction coefficient of 0.4

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Figure 10

Thickness variations vs expansion ratio for different friction coefficients at fixed cone angle of 20deg

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Figure 11

Thickness variations vs expansion ratio for different cone angles at fixed friction coefficient of 0.4

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