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Influence of internal stresses on the development of cracks in glasses

Einfluß der Eigenspannungen auf die Rißausbreitung in Gläsern
: Richter, H.J.; Soltesz, U.; Sommer, E.

Francois, D.; Bathias, C.:
Advances in fracture research 1981. Proceedings. Vol.5
Oxford: Pergamon Press, 1981 (International series on the strength and fracture of materials and structures)
ISBN: 0-08-025428-4
pp.2303-2310 : Abb.,Lit.
International Conference on Fracture (ICF) <5, 1981, Cannes>
Conference Paper
Fraunhofer IWM ()
Bruchgabelung; effektive Rißlänge; Eigenspannung; Glas; innere Spannung; K-Verteilung; langsame Rißausbreitung; Rißfrontkrümmung; vorgespanntes Glas

Fracture phenomena due to internal stresses in toughened glass plates are described. Compared with uniform stress fields a different crack propagation and branching behaviour is observed which can be explained formally by an effective crack length of the order of the plate tickness. The influence of internal stresses on the crack front curvature is shown and a method to measure the K-distribution along the crack front is proposed.