In order to research the propagating rules of stress wave in piezoelectric ceramic composite structure (front substrate-piezoelectric ceramic-rear substrate) and characteristics of the output voltage for piezoelectric ceramics under strong shock loading. The Polyvinylidene Fluoride (PVDF) pressure test system

the output voltage test system and the one-stage light gas gun loading system were built by ourselves and used in the laboratory. Experiments were carried out by 2A12 aluminum cylindrical projectile at the velocities of 313m/s

326m/s

379m/s and 397m/s

respectively

against piezoelectric ceramic composite structures (rear substrates of different materials). The voltage signal generated by the PVDF pressure sensor between the piezoelectric ceramic and the rear substrate and the voltage output signal of the piezoelectric ceramic were collected. At the same time

based on the propagating theory of one-dimensional elastic wave

the relationship between the collision velocity and the pressure peak of the stress wave in the variable cross-section problem formed by the contact between the projectile and the piezoelectric ceramic composite structure is deduced. The stress peaks at the rear surface of the piezoelectric ceramic were obtained at different collision speeds based on the relationship deduced. The peaks of the voltage output for the piezoelectric ceramics are calculated by the theoretical relationship between the peak of output voltage for piezoelectric ceramic and the peak value of the impact pressure. The peak value of the shock pressure is obtained by the experimental data processing from the voltage signals measured programmed by Matlab. The results show that the peak values of the impulse pressure and the voltage output are basically consistent with the experimental results. When the impact speed is close

the material properties (plexiglas and aluminum alloy) of the rear substrate have a significant effect on the peak value of the stress pulse. The peak value of the stress pulse of the plexiglass as the rear substrate is higher than the peak value of the pulse stress when the rear substrate is an aluminum alloy. And the pulse duration of the plexiglass as the rear substrate is longer than the duration of the pulse when the rear substrate is an aluminum alloy. The peak value of the voltage output of the piezoelectric ceramic increases with the increase of the impulse pressure and it is non-linear.