Generolo Jono Žemaičio Lietuvos karo akademija

This paper addresses the problem of experimental reproducibility in the study of blast effects during explosive tactical breaching. In real conditions, breaching charges exhibit significant variability, which complicates the comparison of measured pressure responses and limits systematic research. The study investigates whether real breaching charges can be replaced by standardized spherical charges with an equivalent TNT effect. Experimental measurements were carried out in a training facility using pressure sensors, and the results were evaluated in terms of peak overpressure, impulse, and pressure-time history. The findings indicate that standardized charges provide comparable blast characteristics, with differences within acceptable limits. The proposed approach enables more reproducible experiments and creates a basis for further research on structural resilience and human exposure to repeated blast loading.

This paper evaluates the influence of extended stand-off distance on the performance of 3D-printed copper-filled shaped charge liners. The study follows a previous experiment in which complete perforation was achieved at stand-off distances of 0, 15, 30 and 60 mm. Two additional distances, 100 and 150 mm, were tested using the same charge configuration. The results were assessed qualitatively based on penetration morphology. Complete perforation was achieved in all cases, but the 150 mm configuration showed reduced channel regularity and probable loss of jet coherence. The most favorable morphology was observed at 60 mm.