Cracks and energy—Criteria for brittle fracture
- 1 May 1976
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 47 (5) , 1833-1836
- https://doi.org/10.1063/1.322901
Abstract
The energies of cracks are considered in terms of the first and second laws of thermodynamics, and it is concluded that the Griffith criterion provides a necessary but not sufficient condition for crack propagation. Fracture occurs only when the crack tip radius is larger than a critical value that is several times the interatomic spacing. Surface energies calculated from fracture experiments probably give only an upper bound to the true surface energies of solids. The radius of the crack tip is a parameter that cannot be ignored in fracture experiments.This publication has 12 references indexed in Scilit:
- Lattice Trapping of Fracture CracksJournal of Applied Physics, 1971
- Strength of Near-Perfect Single Crystals of CadmiumJournal of Applied Physics, 1970
- The effective surface energy of brittle materialsJournal of Materials Science, 1968
- The work of fracture and its measurement in metals, ceramics and other materialsJournal of Materials Science, 1966
- Direct Measurement of Fracture Energies of Brittle Heterogeneous MaterialsJournal of the American Ceramic Society, 1965
- Published by Elsevier ,1962
- Direct Measurements of the Surface Energies of CrystalsJournal of Applied Physics, 1960
- Deformation and fracture of small silicon crystalsActa Metallurgica, 1957
- An analysis of the conditions for rupture due to griffith cracksProceedings of the Physical Society, 1947
- VI. The phenomena of rupture and flow in solidsPhilosophical Transactions of the Royal Society A, 1921