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Abstract
AbstractThis paper addresses the problem of multi‐layer flyer impact‐induced initiation of a high‐energy explosive PBX‐1(based on 95 % TATB). The CREST reaction combustion model based on the time‐step difference method is embedded in LS‐DYNA, and the pressure history of PBX‐1 in multiple impact initiation is numerically simulated. The strengths and weaknesses of the two models are analyzed by comparing the simulation results of the pressure‐based IG model and the entropy‐based CREST model in multiple impact initiation. The results show that the CREST model is significantly better than the IG model in the problem of multiple impact initiation of PBX‐1, and it matches the experimental results better.
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