A multi-linear kinematic, two dimensional finite element model incorporating Bauschinger effect, developed using ANSYS commercial software is used to determine the effect of machining both at the bore and at the outside diameter, on the depth of yield, maximum firing pressure and final residual stress field present in an autofrettaged gun tube. The model, which is in good agreement with experimental findings, clearly shows that the reduction in maximum compressive circumferential stress is more sensitive to internal machining than to external machining; the depth of yield remains stable and there is no movement of the elastic-plastic interface, relative to its location before material removal. If the internal machining removes material in which reverse yield has occurred, the maximum firing pressure is not affected. The finite element analysis supported by experimental evidence thus leads to an optimization technique for gun tube design.
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August 2003
Technical Papers
Numerical Analysis of the Effect of Machining on the Depth of Yield, Maximum Firing Pressure and Residual Stress Profile in an Autofrettaged Gun Tube
Amer Hameed,
Amer Hameed
Engineering Systems Department, Cranfield University, UK
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R. D. Brown,
R. D. Brown
Engineering Systems Department, Cranfield University, UK
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J. G. Hetherington
J. G. Hetherington
Engineering Systems Department, Cranfield University, UK
Search for other works by this author on:
Amer Hameed
Engineering Systems Department, Cranfield University, UK
R. D. Brown
Engineering Systems Department, Cranfield University, UK
J. G. Hetherington
Engineering Systems Department, Cranfield University, UK
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division March 13, 2003; revision received May 6, 2003. Associate Editor: M. Perl.
J. Pressure Vessel Technol. Aug 2003, 125(3): 342-346 (5 pages)
Published Online: August 1, 2003
Article history
Received:
March 13, 2003
Revised:
May 6, 2003
Online:
August 1, 2003
Citation
Hameed , A., Brown , R. D., and Hetherington, J. G. (August 1, 2003). "Numerical Analysis of the Effect of Machining on the Depth of Yield, Maximum Firing Pressure and Residual Stress Profile in an Autofrettaged Gun Tube ." ASME. J. Pressure Vessel Technol. August 2003; 125(3): 342–346. https://doi.org/10.1115/1.1593081
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