Experimental analysis of the tube life problem with pulse thermal, chemical, and mechanical actions

Lei Fan; Wei Ming Liu; Zhao Jun; Cheng Xu

doi:10.1117/12.839049

24 August 2009 Experimental analysis of the tube life problem with pulse thermal, chemical, and mechanical actions

Lei Fan, Wei Ming Liu, Zhao Jun, Cheng Xu

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 737516 (2009) https://doi.org/10.1117/12.839049
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

In this paper, a life testing system of a gun barrel was set up and a set of experiment was used for the diagnostics of gun barrel erosion in rapid-fire condition. The progressive erosion micrographs of the bore surface of a gun tube are obtained by means of a special optical method. Muzzle velocity and the progressive change of the loss of the muzzle velocity in the life time are measured by projectile velocity measurement system. The progressive change of the bore dimensions of the test barrel is monitored. Surface temperature distribution of the gun barrel is measured by the thermocouples. A thermal-solid coupled model of a gun barrel in cyclic firing condition is built and transient temperature field is presented. Theoretical calculations and experimental measurements indicate that heat is transferred from the pulse hot gas to the bore surface by forced convection, further raising the bore surface temperature, which not only reduces the gun mechanical strength, but also promotes chemical interactions. It is one of the key factors of the gun barrel erosion life. New understanding of performance decay and its mechanisms of a machine gun barrel in lifetime are presented.

Citation Download Citation

Lei Fan, Wei Ming Liu, Zhao Jun, and Cheng Xu "Experimental analysis of the tube life problem with pulse thermal, chemical, and mechanical actions", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 737516 (24 August 2009); https://doi.org/10.1117/12.839049

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