The Reaction Threshold and Damage Characteristic of Typical Explosive under Low Amplitude Loading

Abstract:

To study the reaction threshold and damage characteristic under low amplitude loading, two HMX based explosives were chosen for the study. Low amplitude loading experiment was conducted based on card gap test. By adjusting the thickness of card, the applied pressure on the explosive sample was changed. The reaction situation of the explosive was judged by the witness board and the steel tube. The results show that the explosives, especially the casting molding explosive having the reaction threshold and detonation threshold. The detonation threshold of the casting molding explosive is 4.72~5.28GPa and the reaction threshold is 2.34~2.46GPa. The detonation threshold of the pressed fitting explosive is 2.46~2.72GPa and the reaction threshold is 2.12~2.23GPa.The damage characteristics of samples before and after shock loading were studied by use of CT system. The results of CT show that no macro-damage appear in explosive by pressed fittingaftershock damage, while cavity appear in explosive by casting molding in the position above 7~8mm of the witness board, the cavity’s length is 7~8mm, diameter is 1~2mm.

• Periodical: Key Engineering Materials (Volume 837)
• Pages: 198-202
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.837.198
• Online since: April 2020
• Authors: Xi Bo Jiang, Peng Gang Jin*, Song Tao Ren
• Keywords: Damage, Low Amplitude Loading, Shock Wave Sensitivity

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