Crack divergence phenomena in tempered glass

Article type: Research Article

Authors: Aratani, Shin’ichi^a;

Affiliations: [a] GMS Laboratory, Ageo City 1964-10, Saitama, Japan E-mail: wildv4nn1@yahoo.co.jp

Correspondence: [*] E-mail: wildv4nn1@yahoo.co.jp

Note: [] Note: This is the second edition published in JSFM, 54(1) (2020), 1–9.

Abstract: High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

Keywords: Crack divergence, bifurcation and branching, divergence angle, 3.5-mm tempered glass, high speed photography

DOI: 10.3233/SFC-204002

Journal: Strength, Fracture and Complexity, vol. 13, no. 3, pp. 115-129, 2020