Accession Number : ADA323827

Title :   Fatigue Analysis of a Vessel Experiencing Pressure Oscillations.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET WEAPONS LAB

Personal Author(s) : Trojano, Edward ; Underwood, John H. ; Scalise, Anthony ; O'Hara, G. P. ; Crayon, Daniel

PDF Url : ADA323827

Report Date : MAR 1997

Pagination or Media Count : 22

Abstract : A pressure vessel, which was 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 were measured at each loading. However, the predominance of the stress amplitudes were well below the critical threshold values necessary to initiate fatigue cracking. Analysis demonstrated that the disparity between lab cycling and field loading conditions could not 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 contributed to the short fatigue life of the vessel.

Descriptors :   *FATIGUE LIFE, *RESIDUAL STRESS, *PRESSURE VESSELS, STRESS STRAIN RELATIONS, PRESSURE GRADIENTS, LOAD DISTRIBUTION, STRESS ANALYSIS, HIGH TEMPERATURE, TENSILE STRESS, CRACKING(FRACTURING), DAMAGE ASSESSMENT, HIGH PRESSURE, LIFE CYCLE TESTING, FATIGUE TESTS(MECHANICS), CYCLIC LOADS, VARIABLE PRESSURE, INTERNAL COMBUSTION ENGINES, RADIAL STRESS, INTERNAL PRESSURE.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE