AGC and Jamstec develop a prediction method of the destruction pattern

　AGC has succeeded in reproducing the destruction patterns when the chemical reinforced glass is damaged in a way in collaboration with the Marine R & D Organization (Jamstec).

　Chemical enhanced glass is a material used for smartphone cover glass.This result is published in the online journal "Physical Review Letters" and "Physical Review E".

　The strength of chemical enhanced glass increases as the strength increases as the surface is given a large compression stress, but the tensile stress is formed inside, and when the wound is deeply, a large number of cracks occur and it is damaged.Therefore, it is important to properly design the strength of enhanced stress in order to produce a chemical reinforced glass that is highly intensity and hard to break.

　On the other hand, the glass destruction pattern was a complicated phenomenon in which cracks branched, so it was difficult to reproduce with conventional simulation technology.For this reason, trial and error from many experiments, such as falling tests and crack analysis, were indispensable for optimizing reinforcement stress.

　This time, a combination of AGC's destructive observation technology and the numerical analysis technology applied to the destructive analysis of soil and ground by Jamstec was developed, and the "dynamic destruction and developmental analysis method in the residual stress ground" was developed.This is the world's first case that succeeded in recreating the process of crack progress that propagates in chemical reinforced glass.

　The AGC Group will use the same method to analyze the intensity analysis of fragile materials and complex materials, including glass, to develop new solutions.