Research on temperature effect on shock initiation of explosives by using mesoscopic reaction rate model

A kind of mesoscopic reaction rate equation was reviewed for the limitation of Lee & Tarver reaction rate equation for predicting the effect of temperature on shock initiation of explosives. It is found that the coefficients of this mesoscopic reaction rate equation don't depend on initial temperature, which means it doesn't need to be recalibrated as the initial temperature changes. Moreover, the shock initiation processes of PBX-9501 at different initial temperatures are simulated with the coefficients calibrated at ambient temperature by using DYNA2D code. The numerical results on the run distance to detonation are found to be in good agreement with previous experimental data, which verifies this equation has a good availability and application value in terms of predicting the temperature effects of explosives.