ガラスへの圧子押込みにおける応力状態とクラック進展過程の動的観察:—くさび形圧子押込みによる2次元的な観察— [in Japanese] Dynamic Observation of Internal Stress and Crack Formation Process by Indentation on the Glass:—Two Dimensional Observation with Wedge Shaped Indenter— [in Japanese]
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Wheel scribing techniques were commonly used for glass separation. We have studied on the internal stress field during/after wheel scribing using the photoelastic method. Internal stress data obtained by photoelastic method was integrated data of the light progression, and internal stress induced by a scribing wheel distributed three-dimensionally. This characteristic complicates the explanation of the photoelastic data. In this paper, we investigate two dimensional internal stress fields by the indentation of a wedge on a thin glass sheet. As a result, birefringence and azimuthal angle was obtained during/after the indentation. Internal stress by the plastic deformation was observed. First, median cracks were propagated after the indentation, then lateral cracks were propagated. The internal stress was released along with the crack propagation.
- Journal of the Japan Society for Precision Engineering
Journal of the Japan Society for Precision Engineering 83(4), 381-386, 2017
The Japan Society for Precision Engineering