New crack generation phenomena by crack collision in 10 mm thick tempered glass

Article type: Research Article

Authors: Aratani, Shin’ichi^a;

Affiliations: [a] GMS Laboratory, Ageo-City 1964-10, Saitama, Japan E-mail: [email protected]

Correspondence: [*] E-mail: [email protected]

Note: [] The Japanese version of this paper has been published in the Journal of the Japanese Society for Strength and Fracture of Materials, 54 (2020), 41–49.

Abstract: High speed photography by Caustics method using Cranz–Schardin camera was used to study crack propagation and divergence in thermally tempered glass. Tempered 10 mm thick glass plates were used as a specimen. New crack generation by two crack collision was observed. Regarding the presence/absence of new cracks, the dependence of the two cracks on the collision angle was confirmed. Considering that it is based on the synthesis of stress 𝜎CR generated at the crack tip, tensile stress necessary for the generation of new cracks could be created.

Keywords: New crack generation, crack collision, overlapping of stress and stress 𝜎_CR, caustics method, 10 mm thick tempered glass

DOI: 10.3233/SFC-210280

Journal: Strength, Fracture and Complexity, vol. 14, no. 1, pp. 45-57, 2021