A Study on Crack Formation in the K11 Objective Individual Combat Weapon Fire Control System using Analysis of Variance

ABSTRACT Purpose: This study examined the problem of crack formation in the fire control system(FCS) of the K11 objective individual combat weapon(OCIW), using design of exper iment analysis. Three hypothesis were considered. The first hypothesis is that bolted joint has an ef fect on impulse caused by firing the weapon and the second hypothesis is that a short time interval of shooting has an effect on impulse and lastly, the third hypothesis is that a positive correlation has between the bolted joint of the FCS and the impulse. Methods: The relationship between the bolted joint and the impulse cause by firing the weapon were examined experimentally. The first and second hypothesis was tested usin g correlation analysis and the t-test.Results: Using ANOVA, the first null hypothesis was rejected and the alternative hypothesis was accepted. ANONA confirmed the second null hypothesis. Correlation analysi s dismissed the last null hypothesis. A pos-itive correlation between the bolted joint and the impulse caus ed by shooting the weapon was verified. Conclusion: The bolted joint of the K11 FCS and the barrel of t he K11 affect the impulse caused by firing the weapon. A positive correlation was established between the bolted joint of the FCS and the impulse on firing the K11 OICW.Key Words：Fire Control System Cracks, One-way Design of Experiment, Correlation Analysis