Creep Ovalization and Buckling of a Linear Viscoelastic Externally Pressurized Pipe

[+] Author and Article Information
Carl H. Popelar

Popelar Mechanics, 602 Stone Wood Dr., San Antonio, TX 78216

Donald Evans

99-1669 Hoapono Pl., Aiea, HI 96701

J. Pressure Vessel Technol 126(2), 208-215 (May 05, 2004) (8 pages) doi:10.1115/1.1688370 History: Received April 29, 2003; Revised October 21, 2003; Online May 05, 2004
Copyright © 2004 by ASME
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Schematic of ovalized pipe cross section
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Contour for evaluating the Bromwich integral
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Variation of the integral I(sct) for m=0.095
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Comparison of results for the exact inversion method, direct inversion method and the quasi-elastic approximation
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Schematic of test apparatus
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Comparison of model predictions with measurements for different test pressures at 50°C
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Comparison of extended ovality measurements at a pressure of 55.2 KPa (8 psi) and temperature of 50°C with predictions
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Comparison of measured and predicted ovalization for a HDPE, DR21 pipe for a temperature of 35°C and an external pressure of 121 KPa (17.5 psi)




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