Abstract:The overload signal of fuze is prone to be adhesion while projectile penetrating multi-layer target with high speed. This problem would cause failure of judgment the layers. The ahhesion phenomenon is related to many factors, such as the penetration speed, parameters of the projectile, the characteris of target and so on. In this paper, the influence of penetration speed and projectile length-diameter ratio on the overlaod signal adhesion is analyzed by numerical simulation. Firstly, the reliability of the mat… Show more
“…For example, when glass is subjected to the impact of a stone, the back of the glass often fractures and collapses first. When a static load is applied to one end of a metal rod, an experimental phenomenon opposite to that of applying a dynamic load occurs: the deformation of the metal rod under static load is basically uniformly distributed along the metal rod, while under impact load, the deformation is concentrated more at the two ends of the metal rod [7,8].…”
To enhance the impact resistance of penetration fuze, this paper investigates the response of fuze buffer materials to stress waves and develops a model for stress wave transmission inside the fuze. The stress concentration impacts of different cell structures of Imitation Bamboo Type Penetration Fuze Buffer Protection Structure (IBS) under stress wave action are compared and analyzed. The paper elucidates the impact of different cell parameters on stress concentration impacts, establishes nonlinear fitting functions of Stress Concentration Factor (SCF) and cell parameters, and solves the prediction error. Based on the wave function expansion method, an expression for Dynamic Stress Concentration Factor (DSCF) when stress waves interact with the potting material is derived, and numerical results of DSCF around bubbles under different physical parameters are provided. Finally, dynamic impact tests are conducted on the combined buffer scheme of penetration fuze. Impact test results show that, under an initial velocity impact of 50 m/s, the overload peak attenuation rate is 39.42%, and under an initial velocity impact of 70 m/s, the overload peak attenuation rate is 32.87%. IBS can effectively protect the electronic components inside the fuze.
“…For example, when glass is subjected to the impact of a stone, the back of the glass often fractures and collapses first. When a static load is applied to one end of a metal rod, an experimental phenomenon opposite to that of applying a dynamic load occurs: the deformation of the metal rod under static load is basically uniformly distributed along the metal rod, while under impact load, the deformation is concentrated more at the two ends of the metal rod [7,8].…”
To enhance the impact resistance of penetration fuze, this paper investigates the response of fuze buffer materials to stress waves and develops a model for stress wave transmission inside the fuze. The stress concentration impacts of different cell structures of Imitation Bamboo Type Penetration Fuze Buffer Protection Structure (IBS) under stress wave action are compared and analyzed. The paper elucidates the impact of different cell parameters on stress concentration impacts, establishes nonlinear fitting functions of Stress Concentration Factor (SCF) and cell parameters, and solves the prediction error. Based on the wave function expansion method, an expression for Dynamic Stress Concentration Factor (DSCF) when stress waves interact with the potting material is derived, and numerical results of DSCF around bubbles under different physical parameters are provided. Finally, dynamic impact tests are conducted on the combined buffer scheme of penetration fuze. Impact test results show that, under an initial velocity impact of 50 m/s, the overload peak attenuation rate is 39.42%, and under an initial velocity impact of 70 m/s, the overload peak attenuation rate is 32.87%. IBS can effectively protect the electronic components inside the fuze.
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