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A model for critical crack size estimation in fatigue failure of gun barrels
Author(s) -
Padgett W. J.,
Durham S. D.
Publication year - 1989
Publication title -
naval research logistics (nrl)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 68
eISSN - 1520-6750
pISSN - 0894-069X
DOI - 10.1002/1520-6750(198904)36:2<139::aid-nav3220360203>3.0.co;2-y
Subject(s) - barrel (horology) , materials science , fatigue testing , structural engineering , residual , fracture mechanics , critical distance , mechanics , mathematics , composite material , engineering , geology , physics , algorithm , sound power , geomorphology , sound (geography)
Abstract With repeated firing, fatigue cracks are produced in a gun barrel, and the barrel is no longer useful when a crack reaches a critical size. The initial crack size and the critical crack size, as well as the number of firings producing the critical crack size, may be considered as random variables. Assuming a proportional damage model for crack growth, a method for estimating the critical crack size distribution is presented. From these results, an estimate of the barrel life, or the residual barrel life once a crack of a given size is measured, can be obtained.