Tensile Fragmentation of Virgin Glass Fibers
In some tensile tests with brittle materials, fractures are occasionally produced at two different cross-sections, seemingly simultaneously, when the rupture load is reached. It is believed that this phenomenon of the second rupture is caused by the destructive action of the elastic strain waves generated during the first of the two fractures. Miklowitz1) and Phillips2) have shown that two types of waves are generated; the first is a longitudinal unloading wave and the other is a group of flexural strain waves caused by the moment that develops at the initial fracture section. The superposition of the two waves will raise the magnitude of stress somewhere in the specimen higher than that of the static stress initially applied.
KeywordsGlass Fiber Reverse Motion Secondary Fracture Fragmentation Velocity Vitreous Silica
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