An experimental exploration on the dynamic compressive properties of annealed and chemically strengthened glass

Structures with glass can be subjected to the impact of foreign objects. It is of great importance to learn the mechanical behavior of glass under high strain rates. In this article, a series of compressive tests at uniaxial loading (quasi-static, dynamic unidirectional and dynamic bidirectional) were conducted on the annealed and chemically strengthened aluminosilicate glass. The effects of strain rate, the number of incident waves and chemical strengthening on the strength and fracture properties were discussed. The test results revealed that the increase of strength with strain rate mutates at a critical strain rate. A power law relation was used to describe the dynamic increase factor with strain rate. Chemical strengthening significantly affects the compressive properties of the material and weakens the positive effect of strain rate. The dynamic compressive strength is not influenced by the number of incident waves, which is probably due to the similar speed of crack propagation at dynamic unidirectional and bidirectional loading. An empirical equation has also been proposed to describe the combined effects of strain rate and chemical strengthening on the compressive strength.