Theoretical calculation for surface abrasion effect of projectiles penetrating in to concrete targets with a high speed

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (15) : 51-58.

GUO Lei， HE Yong， PAN Xuchao， HE Yuan， WANG Chuanting， JIAO Junjie,HE Xun

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Abstract

the surface abrasion effect of a projectile becomes significant with increase in impact velocity during its penetrating with high speed into a concrete target. Based on the thermoplastic failure mechanism of projectile material, the friction effect between the projectile and the target in high speed penetration process and the temperature rise due to the plastic strain effect of projectile material were analyzed and determined. Combining the local action between the projectile and the target, according to heat transfer equations and the formula converting plastic work into heat, and adopting Johnson-Cook constitution equation, the temperature distribution on the projectile surface due to these two effects was calculated. Utilizing the critical temperature criterion and the difference iteration method, the failure thickness of the projectile surface’s material was calculated, and the projectile’s penetration and abrasion processes under different conditions were analyzed, the projectile’s contour evolution was obtained. The theoretical calculation results were compared with those of the existing tests, the correctness of the proposed theory and method was verified.

Key words

explosion mechanics / high-speed penetration / abrasion effect / thermo-plastic instability

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GUO Lei， HE Yong， PAN Xuchao， HE Yuan， WANG Chuanting， JIAO Junjie,HE Xun. Theoretical calculation for surface abrasion effect of projectiles penetrating in to concrete targets with a high speed[J]. Journal of Vibration and Shock, 2018, 37(15): 51-58

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