جستجوی مقالات مرتبط با کلیدواژه "comp-b" در نشریات گروه "مواد و متالورژی"

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.

Detonation initiation by shock is an important issue in the explosive safety assessment , design of the explosive train and explosive devices. Experimental studies in this area are very difficult, expensive, and require advanced equipment. Therefore, simulation is a useful and suitable way for studying this phenomenon. The purpose of this article is to develop a one-dimensional computer code for simulation of the direct initiation of energetic materials. The Fortran SIN hydrocode, was used for this purpose and the I&G burn model was added to this code. The developed code was used to simulate the direct initiation of the Comp-B by sustained shock pulses. A good agreement was observed between the present simulation results and the results of other references. For example, in the simulation of the initiation of Comp-B by 3.78 GPa shock, the run distance to detonation was 14.8mm, which the difference between this value and the reported experimental data is 5.7%.