Abstract

Fracture behavior of the glass plate with a crack is analyzed under static, quasi-static and dynamic loading by using the optical interferometry and the caustic method. At first, a comparatively easy technique to produce a natural crack in glass plate by using three-point bending and the caustic method is shown. Next, stress intensity factor and crack opening displacement (COD) in the vicinity of a crack tip are in detail investigated by applying the optical interferometry and the caustic method under static and quasi-static loading conditions. Furthermore, dynamic fracture behavior is studied by using caustics and ultra-high speed camera, and gone discussions are given.

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