Demonstration Project Relating to Stress Analysis of SWAGE- Autofrettaged and Re-Autofrettaged Gun Tubes; Final rept. 7 Aug 2007-27 May 2008

摘要

The principal investigator (APP), worked for a total of two weeks at Benet Research Laboratory, Watervliet, NY, using results from a dummy swage autofrettage FEA stress analysis in a non-linear stress analysis of the post heat treatment hydraulic re-autofrettage of a swaged tube. APP collaborated with Benet staff in: (a) Predicting permanent OD strains for a re-autofrettaged gun tube manufactured from HB7 steel. and (b) Devising material modeling procedures for use with ABAQUS/FEA aimed at incorporating Bauschinger effect. APP attended the 2007 ASME Pressure Vessels and Piping Conference in San Antonio, Texas, presenting two papers relating to autofrettage design. Subsequently the principal investigator (c) Developed the analyses relating to the demonstration project; (d) Collaborated with Mr. E. Troiano of Benet Labs and others in the preparation of a paper on material modeling for autofrettage analysis; (e) Provided a draft paper analyzing stresses due to swage autofrettage and hydraulic re-autofrettage of a gun tube; (f) Supplied a draft patent outline relating to hydraulic re-autofrettage of a swage-autofrettaged pressure vessel. The final patent application has now been submitted. This report contains descriptions and references relating to all significant project outcomes.