A Chamber Pressure Prediction Method Based on Strain Measurement of Composite Barrel Recoilless Guns

Abstract To predict the chamber pressure of positions corresponding to strain data gun barrel’ outside walls, this study measures and different in a recoilless gun, proposes calculation method which is based on measurement cylinder walls using single-layer thin-walled theory plane strain-elastic stress solution for multi-layer orthotropic cylinders. Experimental results showed that deformation at was caused by varying factors. Specifically, attributed expansion high-pressure propellant gas, showing curve similar pressure. The barrel part between throat muzzle first band engraving then gas. If effect neglected, changes there were found be well line with gas expansion. revealed relative errors values predicted proposed measured ones range 0.82%-7.88%, suggesting can effectively error position large, reaching 7.88%, due neglect gap cartridge case chamber’s inside walls. satisfactorily predicted, minimum 0.82% maximum only 5.89% muzzle.