Study on the effect of binder content on the cook-off response characteristics of HMX-based PBX

ABSTRACTThe cook-off tests and numerical simulations were carried out on the HMX-based PBX to study the influence of binder content on the cook-off response characteristics of PBX. The temperature change history of the powder column was obtained, and the change in temperature due to crystal transformation was observed. The response temperature of the column was obtained. In addition, the results showed that the response temperature of the PBX decreased with the increase of the binder content. Under the same binder content, the damage to a slow cook-off bomb was higher than that of a fast cook-off bomb. In the fast cook-off test, the cook-off response temperature of the HMX-based PBX was 310.3 ℃~322.5 ℃ The critical Estane content when the response grade was combustion was 5%. Under the slow cook-off conditions, the response temperature was 260.8 ℃ ~278.6 ℃. The critical Estane content when the response grade was combustion was 7%. Numerical simulation results proved that adding binder would cause a temperature drop due to the crystal transformation. The higher the binder content, the more noticeable this phenomenon was. The maximum error between the numerical simulation and the test results did not exceed 6.5%. KEYWORDS: Binder contentcook-off testscrystal transformationHMX-based PBXnumerical simulation Disclosure StatementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe authors would like to acknowledge [Shanxi Science and Technology Department] grant number [20210302124210] to provide funds for conducting experiments.