Residual Stress Study of Autofrettaged Barrel under Impulsive Loading

Abstract:

An analysis model of barrel was established for rapid-firing gun by using the thermal structure direct coupling analysis method. As a solving tactics, finite element method was employed to analyze the influence of degree of autofrettage on the residual stress of the tube under impact load caused by high temperature and high pressure powder gases during continuous shots process. The results indicated that there is a significant effect of degree of autofrettage on the residual stress distribution of barrel. As the autofrettage level increases, the radius of the compressive tangential plastic strain zone on the inner wall and the maximal residual stress of the base near chromium-steel interface become larger. This is the cause that the tensile tangential plastic strain in the self-reinforced barrel easily occurred in the process of continuous shots after cooling. This goes against stability of the stress condition of the gun tube.

• Periodical: Applied Mechanics and Materials (Volume 518)
• Pages: 144-149
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.518.144
• Online since: February 2014
• Authors: Pu Qu, Qiang Li*, Shu Fang Yang
• Keywords: Autofrettage Level, Direct Coupling Method, Finite Element Method (FEM), Residual Stress

References

[1] Liezhen Chang, Yutian Pan and Xinmou Ma, Residual Stress Calculation of Swage Autofrettage Gun Barrel, International Journal of Computer Science Issues, Vol. 10, No. 3(2013), pp.52-59.

[2] Seung-Kee Koh, Fatigue analysis of autofrettaged pressure vessels with radial holes, International Journal of Fatigue, Vol. 22(2000), pp.717-726.

DOI: 10.1016/s0142-1123(00)00040-2

[3] R.S. Salzar. Influence of autofrettage on metal matrix composite reinforced gun barrels, R.S. Salzar / Composites: Part B 30 (1999), p.841–847.

DOI: 10.1016/s1359-8368(99)00051-7

[4] J. J. Yao, C. Xu and K. Guo. The analysis to thermal-stress coupled field in the barrel of rapid fire weapon [J]. Journal of Gun Launch & Control, 2001(2), pp.36-39.

[5] M. Perl and B. Ostraich. The combined effect of pressure and autofrettage on uniform arrays of three-dimensional unequal-depth cracks in gun barrels. Journal of Pressure Vessel Technology, 2005, 127, pp.464-470.

DOI: 10.1115/1.1806445

[6] Yadong Xu et al. Three-dimensional finite element analysis and optimization of composite material barrel, Journal of Nanjing University of Science and Technology, 2007, 31(2), pp.350-353.

[7] A. B. Ayob, M. N. Tamin, and M. Kabashi Elbasheer. Pressure Limits of Thick-Walled Cylinders, Proceedings of the International Multi-Conference of Engineers and Computer Scientists, 2009, Vol. II.