A mechanism for the compressive failure of soda-lime and borosilicate glasses is propose dbasedupon hgih-speed hotography of impact on glasses. Shock loading was produced by the impact of a 50 mm diameter projectile so inducing shock states of one-dimensional strain in glass targets. The shock waves and fialure frontswere visualised using the shadowgraph techniqeu. The fialure appeared to occur atdiscrete nucleaiton sites and propagated out to form a continuous front. The velocity of this fornt increased with hgiehr impact stresses and varied with the glass composition.
Bourne, N. K. Rosenberg, Z.