Experimental and numerical study on interfacial impact load transfer mechanism.

Abstract

Focusing on the engineering challenge of complex and unpredictable interfacial impact load transfer during the penetration process of a certain type of bomb, this study integrates hammer impact testing and finite element simulation methods to quantitatively analyse the dynamic response characteristics at the nose section/projectile and projectile/base section interfaces. The input and output responses of the interfaces under impact loads were obtained through hammer tests, revealing the variation patterns of peak load and stress during interfacial transfer. Based on Matlab model identification tools, an equivalent transfer model for interfacial loads was established, enabling effective prediction of peak load and pulse width changes during load propagation. The prediction error of the numerical model is less than 15%, meeting engineering accuracy requirements. The research findings provide direct data support and a modeling basis for enhancing the performance of weapon systems.