Solution for self explosion of tempered glass (1) - reducing stress values

The distribution of stress in tempered glass is that the two surfaces of tempered glass are under compressive stress, the core layer is under tensile stress, and the stress distribution in glass thickness is similar to a parabola. The center of the glass thickness is the vertex of the parabola, which is the point where the tensile stress is maximum; There is compressive stress near the two surfaces of the glass on both sides; The zero stress surface is located approximately one-third of the thickness. By analyzing the physical process of tempering and rapid cooling, it is known that there is a rough proportional relationship between the surface tension of tempered glass and the maximum tensile stress inside, that is, the tensile stress is 1/2 to 1/3 of the compressive stress. Domestic manufacturers generally set the surface tension of tempered glass at around 100MPa, but the actual situation may be higher. The tensile stress of tempered glass itself is about 32MPa~46MPa, and the tensile strength of glass is 59MPa~62MPa. As long as the tension generated by the expansion of nickel sulfide is 30MPa, it is sufficient to cause self explosion. If the surface stress is reduced, it will correspondingly reduce the inherent tensile stress of tempered glass, thereby helping to reduce the occurrence of self explosion.