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Youcai Xiao,Xiangdong Xiao,Chenyang Fan,Yanyi Xiong,Zhijun Wang,Yi Sun 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.6
Insensitive munitions (IM) assessments are required to carry out the sympathetic detonation (SD) experiments. The impact of blast fragments or strong shock waves is the cause of sympathetic detonation. In this paper, a numerical simulation method is developed to predict the sympathetic detonation behavior of fuze explosive trains under the impact of blast fragments, which includes the ignition and growth (I&G) model, the JonesWilkins-Lee (JWL) equations of state, and a constitutive relationship. The experimental and numerical results were compared and analyzed, and the validity of the numerical simulation method was proven. The sympathetic detonation behavior of a fuze was studied for a single donor and multiple acceptors. The critical distance was obtained with the presence of fragments using numerical simulation. A critical distance model was developed, which provides a theoretical model for relating the detonation sequence and the placement distance of the fuze explosive train. The simulated results agreed with the theoretical calculations, and thus the model can provide the support for sympathetic detonation experiments.