Experimental research on failure wave of brittle materials under shock loading

In order to investigate the failure wave of brittle materials, such as glasses and ceramics, under dynamic compressive loading, the planar impact experiments of A95 alumina ceramic and soda lime glass were conducted under one-dimensional strain condition. The particle velocities on the rear surfaces of samples were acquired by using the VISAR technique. The results show that a re-compression signal on the temporal curve of soda lime glass which represents the occurrence of failure wave under certain pressure, which is agreement with many results in open literatures [1, 4, 8-12, 17-21], but no re-compression signal exists on the temporal curve of alumina ceramic. This shows that the damage or fracture mechanisms of glasses and ceramics under shock loading may be different, which need more research in the future.