TWO DIMENSIONAL NUMERICAL SIMULATION ON SHOCK INITIATION AND DETONATION BEHAVIOR OF IMPACT DAMAGED PBX MATERIAL

摘要

Impact damage can influence PBX initiation and detonation behavior.A new reaction rate function model is built up based on KIM model.Parameter of the new model is acquired by genetic algorithms.And validation of model is verified by compared simulation results with Forest-Fire model.Two dimensions numerical simulation of PBX is executed to explosive's initiation and detonation process by embedded the new model into finite element analysis program.Numerical simulation results arc good agreement with experiment results.The new reaction model can be used to analysis detonation mechanism of damaged explosive while porosity and grains size is changed by impact load.