Barrel Life Prediction of Rotating Barrels Machine Gun Based on Fatigue Damage of Chromium-steel Interface

doi:10.3969/j.issn.1000-1093.2016.10.020

Abstract

Abstract: To predict the life of a gun barrel, the theories of thermal-solid coupled stress, the impact fatigue and fatigue cumulative damage are used to derive the life prediction of a gun barrel based on fatigue damage of chromium-steel interface. A 3D finite element model for a 3-barrels rotating machine gun is built to calculate the coupling stress of chromium-steel interface. The barrel life of the rotating barrels machine gun is estimated. The estimated result is basically consistent with the experimental result. The analysis results show that the fatigue damage life at chromium-steel interface almost determines the life of the gun barrel. The effect of the thickness of chromium coating on the life of gun barrel is studied. The research result shows that the life of gun barrel can be improved by increasing the thickness of chromium coating properly.

Key words: ordnance science and technology, automatic weapon, gun barrel, coupling stress, life, fatigue, prediction model

CLC Number:

TJ202

XU Ning, WU Yong-hai, WANG Yong-juan, XU Cheng. Barrel Life Prediction of Rotating Barrels Machine Gun Based on Fatigue Damage of Chromium-steel Interface[J]. Acta Armamentarii, 2016, 37(10): 1926-1933.

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