Estimation of the Ignition and Growth (I&G) Reaction Rate Model Parameters for Comp-B

One of the most important issues when working with energetic materials is their initiation. Of the various methods of energetic materials initiation in the military and civilian industries, shock initiation is of particular importance. Numerical and simulation study of the shock initiation of condensed phase explosives is related to models called burning rate models, which describe the conversion rate of unreacted materials to detonation products. Among the burning rate models that have been proposed for explosives so far, the Ignition and Growth (I&G) model is one of the most popular and widely used models. In this paper, the genetic optimization algorithm is coupled with an upgraded Fortran SIN simulator hydrocode. The calibration was based on minimizing the difference between the calculated pressure data and the experimental data obtained from manganin pressure gages in the shock initiation tests. The results of optimizing the I&G parameters for Comp-B demonstrates good accuracy of the algorithm; So that after calibration, the difference between the pressure history obtained from the calculations of this paper and the experimental data was about 15% and in this respect is about 6% more accurate than the results reported in previous reseorches.