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

The 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 degrees C similar to 322.5 degrees C The critical Estane content when the response grade was combustion was 5%. Under the slow cook-off conditions, the response temperature was 260.8 degrees C similar to 278.6 degrees C. 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%.

Automated summary

The influence of binder content on the cook-off response characteristics of PBX was studied through cook-off tests and numerical simulations. It was found that the response temperature of PBX decreased with the increase of 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.