SYMPOSIA PAPER Published: 01 January 1997
STP12321S

Fatigue Analysis of a Vessel Experiencing Pressure Oscillations

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A pressure vessel, designed and tested under laboratory conditions for tens of thousands of cycles, failed in service after only a few cycles. Thousands of oscillatory pressure reversals have been measured at each loading. However, the predominance of the stress amplitudes were well below the critical threshold values necessary to initiate fatigue cracking.

Analysis has demonstrated that the disparity between lab cycling and field loading conditions cannot be explained simply by mechanical loading alone. Further investigation into the problem revealed that an extremely aggressive environment, the by-products of the internal combustion from within the pressure vessel, along with high temperatures, pressures, and other sources of high tensile loading all contribute to the short fatigue life of the vessel.

Author Information

Troiano, E
US Army Research Development and Engineering Center, Benet Laboratories, Watervliet, New York
Underwood, JH
US Army Research Development and Engineering Center, Benet Laboratories, Watervliet, New York
Scalise, A
US Army Research Development and Engineering Center, Benet Laboratories, Watervliet, New York
O'Hara, GP
US Army Research Development and Engineering Center, Benet Laboratories, Watervliet, New York
Crayon, D
US Army Research Development and Engineering Center, Benet Laboratories, Watervliet, New York
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Details
Developed by Committee: E08
Pages: 397–410
DOI: 10.1520/STP12321S
ISBN-EB: 978-0-8031-5374-5
ISBN-13: 978-0-8031-2410-3