Note: [‡] Current office: Shonan Institute of Technology, Japan.
Note: [§] Current office: Teikyo University, Japan. This is the second edition published in JSFM, 53(2) (2019), 21–31.
Abstract: Glass fracture and changes in bending load were investigated by the quasi-static loading method which is characterized by holding a fixed time at each displacement level and incrementally applying displacement. Holding time at each step was 60 s and the incremental displacement was 0.02 mm as the load condition. Ordinary soda-lime-silicate float glass of 50 × 10 × 4 mm was used as the specimen. The glass fracture occurred as the bending load decreased with time, which might be explained using the occurrence of time-dependent fracture and function as a viscoelastic property even at room temperature. Fracture properties of alumina ceramics have the possibility to be closer to float glass than silicon carbide which is called general ceramics.
Keywords: Fracture phenomena, quasi-static method, float glass, time-dependent fracture, viscoelasticity property at room temperature