Change in overstrain level resulting from machining of an autofrettaged thick-walled cylinder

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An analytical model for predicting the level of autofrettage following either inner, outer, or combined machining of a gun barrel is developed based on Hill's (1950) solution for the autofrettage residual stress field. The analysis results in very simple algebraic expressions for the post-machining level of autofrettage in terms of the original level induced in the blank tube. In parallel, a finite element analysis of the machining process is performed in which the residual stress field is simulated by an equivalent thermal load. The numerical results are found to be in excellent agreement with the analytical ones. Thus, as an equivalent thermal load can always be determined, either analytically or numerically, for any other approximations to the residual stress field due to autofrettage, the above methodology can be readily applied enabling the determination of post-machining autofrettage level in these cases.

Original languageEnglish
Pages (from-to)83-90
Number of pages8
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
StatePublished - 1 Dec 1999
EventHigh Pressure Technology - 1999 (The ASME Pressure Vessels and Piping Conference) - Boston, MA, USA
Duration: 1 Aug 19995 Aug 1999

ASJC Scopus subject areas

  • Mechanical Engineering


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