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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

[+] Author and Article Information
Amer Hameed, R. D. Brown, J. G. Hetherington

Engineering Systems Department, Cranfield University, UK

J. Pressure Vessel Technol 125(3), 342-346 (Aug 01, 2003) (5 pages) doi:10.1115/1.1593081 History: Received March 13, 2003; Revised May 06, 2003; Online August 01, 2003
Copyright © 2003 by ASME
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References

Kang,  K. J., and Seol,  S. Y., 1996, “Measurements of Residual Stresses in a Circular Ring Using Successive Cracking,” J. Eng. Mater. Technol., 118, pp. 217–223.
Davidson,  T. E., Kendall,  D. P., and Reiner,  A. N., 1963, “Residual Stresses in Thick Walled Cylinders Resulting From Mechanically Induced Overstrain,” Exp. Mech., 3(11), pp. 253–262.
Hill, R., 1956, The Mathematical Theory of Plasticity, The Oxford Engineering Science Service, Oxford, UK, pp. 78–79.
Avitzur, B., 1993, “Autofrettage—Stress Distribution Under Load and Retained Stresses After Depressurisation—A Modified Plane Strain Case,” US Army ARDEC, Benet Laboratories, SMCAR-CCB-TL, Watervliet, NY 12189-4050. Army Symposium on Solid Mechanics, Plymouth, MA, 17–19 August. Report No. ARCCB-TR-93015.
Hameed, Amer., Brown, R. D., and Hetherington, J. G., 1998, “Comparison of Residual Stresses in a Gun Barrel due to the Process of Autofrettage (evaluated using Sach’s method) with that of simulated Autofrettaged Model using the Finite Element Method,” V European Indirect Fire Symposium, RMCS, Cranfield University, Shrivenham, Swindon, UK, Jun.
Parker, A. P., and Underwood, J. H., 1998, “Influence of the Bauschinger Effect on Residual Stress and Fatigue Lifetimes in Autofrettaged Thick-Walled Cylinders,” Fatigue and Fracture Mechanics, 29th Volume, ASTM STP1321, T. L. Panontin and S. D. Sheppard, eds.
Parker,  A. P., Underwood,  J. H., and Kendall,  D. P., 1999, “Bauschinger Effect Design Procedure for Autofrettaged Tubes Including Material Removal and Sachs’ Method,” ASME J. Pressure Vessel Technol., 121, pp. 430–437.

Figures

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A general form of residual stress distribution in a gun tube including the equivalent stress
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Stress-strain plot for test cylinder under consideration
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Autofrettaged test samples
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Finite element model representing a quarter of a gun barrel (developed in ANSYS)
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Relationship between autofrettage pressure and equivalent firing stress for a cylinder having a wall ratio 2.5
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Relationship between autofrettage pressure and equivalent firing stress for cylinder having a wall ratio of 2.8
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Comparison of circumferential stress in cylinder sample CYL-A, assuming different material characteristics
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Comparison of circumferential stress in cylinder sample CYL-B, assuming different material characteristics
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Effect of Bauschinger on residual circumferential stress assuming different material characteristics
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Change in circumferential strain at the outside diameter upon removal of material at the bore in sample CYL-A
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Relaxation in residual circumferential strain at the bore due to removal of material at the outside diameter in CYL-A
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Change in circumferential strain at the outside diameter upon removal of material at the bore in sample CYL-B
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Relaxation in residual circumferential strain at the bore due to removal of material at the outside diameter in CYL-B
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Effect on internal and external machining on residual circumferential stress in sample CYL-A
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Effect on internal and external machining on residual circumferential stress in sample CYL-A
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Comparison of circumferential stress at the bore of CYL-B, evaluated assuming kinematic and isotropic hardening
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Comparison of plastic strain in thick-walled cylinder, due to internal and external machining, assuming isotropic and kinematic hardening (sample B)

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