Abstract: To research the transient structural response of high-speed projectile, the reverse ballistic experiments of projectile abnormally penetrating into the 2024 Al target were carried out based on 152 mm gas gun launching system, and a digital image correlation method was used to measure the real-time response of projectile in the experiment. The responses of projectile at the penetration conditions of oblique angle, attrack angle, and both oblique and attack angles were compared to obtain the response rules of projectile at different impact conditions. The research results show that the effect of 3° attack angle penetration on the bending response of projectile body is more obvious than that of 10° oblique angle penetration, and the penetration effect at 5° attack angle is more obvious than that at 15° oblique angle penetration on it. The analysis of penetration condition at 5° attack angle and 15° oblique angle shows that the axial elastic strain 1/4 of the projectile nose is 4.6%, and there is only elastic deformation in the projectile tail.Key

Key words: projectile, penetration, structuralresponse, reverseballistic, digitalimagecorrelationmethod