Experiment and Numerical Simulation on Friction Ignition Response of HMX-Based Cast PBX Explosive

In order to study the ignition process and response characteristics of cast polymer-bonded explosives (PBX) under action friction, HMX-based PBX were used carry out friction experiments at a 90° swing angle obtain critical loading pressure was 3.7 MPa. Combined with morphology characterization results PBX, temperature rise numerically simulated macro micro scale, judged. The accuracy numerical simulation ensured based on experiment. Based thermal–mechanical coupling algorithm, mechanical–thermal tablet analyzed from scale. show that maximum is 55 °C, whole not enough ignite explosive. random circle tablet, mesoscopic model constructed, microcrack formed after interface debonding introduced into model. scale shows HMX crystal particles can be ignited 619 K 4 MPa hydraulic loaded by sensitivity instrument. main reason for hot spot generated microcracks damage model, external heat between sliding column has little effect ignition. External affects influencing formation internal cracks stress microcracks.