Crack propagation under constant deformation and thermal stress fracture

✍ Scribed by D. P. H. Hasselman

• Publisher: Springer Netherlands
• Year: 1971
• Tongue: English
• Weight: 291 KB
• Volume: 7
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00183803

✦ Synopsis

An analogy is drawn for crack propagation m brittle solids under constant deformation (strata) and under thermal shock. Following the original approach by Berry it is shown theoretically that under constant deformation an initially short crack, unstable at a critical strain, propagates to a new length which requires a finite increase m strain before it will become unstable agaln~ Similar behavior is expected under conditions of thermal shock where an initially short crack unstable at a critical temperature difference, propagates to a new length such that a finite increase in temperature difference is required before the crack will again continue to propagate. Relative changes in strength as a result of this type of crack behavior are predicted and verified by experimental results for two industrial polycrystalline aluminum oxides subjected to thermal shock by means of a water quench. * Coeffioent of variation. ** Number of specimens.