Ultrasonic Evaluation of the Influence of Density on the Residual Stress of RDX-based Bonded Explosives

Aiming at the problem of cracks and poor dimensional stability of the sample due to the molding residual stress in the molding powder polyblack explosive during the pressing process, a solution to measure the residual stress of the explosive sample using the ultrasonic longitudinal wave method is proposed to analyze the dimensional stability and possibility of the sample Assessment of the location of the resulting cracks. The relationship between different densities and stress distribution states is studied by measuring the ultrasonic characteristic parameters of the samples with different densities, the microscopic particle state of the samples and the residual stress distribution. The reasons for product deformation are put forward to provide reliable data support for the stress state laws of samples at different density stages. The results show that the distribution of residual stress produced by non-destructive measurement during the compression process plays an important role in evaluating the dimensional stability and crack risk of the sample formed by the compression molding of the black explosive