Meanwhile, the crack propagation in the strengthened glass is an extremely complex phenomenon with intricate branching of cracks, which is difficult to reproduce using conventional simulation techniques. To optimize the reinforcing stress, trial-and-error using many experiments such as drop tests, analysis of cracks, and observation of the fracture origin was indispensable.
By combining AGC's fracture observation technology with JAMSTEC's numerical analysis technology that has been applied to soil and ground fracture analyses, the novel theory and simulation method, which can consider the effect of the stress field on the crack propagation, were developed. This is the first time in the world that the process of crack propagation and the branching patterns in chemically strengthened glass have been accurately reproduced using numerical simulations.
 Simulation of catastrophic failure in a residual stress field (Physical Review Letters)
 Mathematical model and numerical analysis method for dynamic fracture in a residual stress field (Physical Review E)
Authors: Sayako Hirobe1, Kenji Imakita2, Haruo Aizawa2, Yasumasa Kato2, Shingo Urata2, Kenji Oguni1
1. Research Institute for Value-Added-Information Generation, Center for Mathematical Science and Advanced Technology, JAMSTEC
2. AGC Inc.
A portion of this research was supported by a grant from the Japan Society for the Promotion of Research (JSPS) (topic number: 20K14812).