Determination of Lee-Tarver Model Parameters of JO-11C Explosive

In order to determine the Lee-Tarver model parameters of JO-11C when the density is 1.707 g/cm³, the detonation propagation of cylindrical charge with different diameters is modelling by AUTODYN software. The output performance parameters such as critical dimension, detonation velocity, detonation pressure and reaction time of different charge diameters through simulation are consistent with the experimental results by fixing and adjusting material model parameters of the JO-11C explosive.The results show that the critical dimension is between 0.4 mm and 0.5 mm, the detonation velocity and pressure increase with the charge diameter increasing and the rule of reaction time is opposite. According to the determined parameters of the Lee-Tarver model, the detonation pressure attenuation of JO-11C charge with different diameter bearing on different steel gap were simulated and compared with the test. The simulation results are in good agreement with the experimental results when charge diameter is greater than 2 mm, which the error is less than 10 %. In smaller charge diameter, the error is also not more than 20 %.