The work aims to explore the propagation laws and energy distribution mechanisms of shock stress waves at the inclined interface at the edge of the laminated ceramic bulletproof plate. According to the boundary characteristics of the spliced bulletproof plate, samples with interface angles of 0°, 5°, 10°, 15°, 20°, 30° and 45° were prepared respectively. Based on the split Hopkinson pressure bar, the dynamic compression test was carried out. With the propagation of the shock wave in the bar system as the monitoring object, an equivalent finite element analysis model was established and verified. The stress amplitude of the reflected wave increased with the increase in the interface angle, and finally stabilized. The stress amplitude and wave amplitude width of the transmitted wave both showed a nonlinear decreasing trend. Regarding energy distribution, when the interface angle was 5°, transmitted and reflected energy accounted for 12% and 52% of the total energy, respectively, while the remaining energy was converted into the kinetic energy of the sample. When the angle increased to 15°, reflected energy constituted over 95% of the total energy, while transmitted energy accounted for less than 0.3%. At this point, relative slip at the interface was minimal, and the energy absorption of the system was significantly reduced. In summary, the spliced interface between ceramic blocks significantly affects stress wave propagation patterns and energy distribution characteristics. Optimizing the interface angle enables effective regulation of energy distribution, providing accurate experimental calibration data for subsequent numerical simulations of three-dimensional protective structures.
Key words
stress waves /
interface angle /
dynamic compression test /
energy transmission and reflection law
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