Since the pressure gradient abruptly increase in the detonation products undergoing a head-on collision of two detonation waves propagating in the cylindrical charge embedded in a metallic tube, the movement of tube wall driven by which will be of particular pattern. The data of expansion, deformation and fracture of the tube are obtained in the experiments with diagnostics of pulsed x-ray shadowgraphy and high-speed photography. A 2-D elastic plastic hydrodynamic Lagrangian code TTD2C has been compiled during this work and succeeded in simulating the head-on collision of two detonation waves, and the resulting products flaw, also the expansion process of metallic tubes driven by it. The calculated and measured results agree well with each other. The result shows that the fracture time advanced became of the heed-on collision.
展开▼
