发射装药挤压应力与破碎规律研究

Study on Extrusion Stress and Fracture Law of Propellant Charge

建立了发射药粒在动态载荷下的挤压破碎过程动力学模型并进行了数值计算,基于发射装药挤压破碎试验装置,研制了挤压应力PVDF传感器,并进行了发射装药动态挤压应力试验。数值模拟结果与试验结果吻合较好,验证了数学模型的正确性和新型传感器设计的合理性,说明新型传感器可以用于发射装药挤压破碎试验中对发射装药颗粒间挤压应力的测量。

The extrusion and fracture process of propellant grains under impact loading is numerically simulated.Based on the experiment instrument of dynamic extrusion and fracture of the propellant charge,the new PVDF stress sensor of the propellant charge used in the experiment instrument is developed.The experiment of the dynamics extrusion and fracture of the propellant charge was performed.The experiment results and the simulation ones have good agreement,indicating that the computation theory and model are accurate,the design of the new sensor is reasonable and the new sensor can be used to measure the extrusion stress of the propellant charge in the experiment of the extrusion and fracture of the propellant charge.