Mechanism of time-delayed fractures
- 1 April 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 51 (4) , 2799-2804
- https://doi.org/10.1103/physreve.51.2799
Abstract
We use atomistic Monte Carlo simulations to reexamine competing theories of fracture nucleation in solids under weak external stresses. We argue that the energy of the critical Griffith crack is not the actual barrier for thermal fracture nucleation in brittle solids as frequently assumed. The nucleation is dominated by the activation of vacancy clusters and not of microcracks, as assumed in the conventional theory of fracture nucleation.Keywords
This publication has 7 references indexed in Scilit:
- Effect of temperature and small-scale defects on the strength of solidsThe Journal of Chemical Physics, 1991
- Molecular-dynamics study of elasticity and failure of ideal solidsPhysical Review B, 1991
- Rate of microcrack nucleationPhysical Review A, 1991
- Statistical-thermodynamic approach to fracturePhysical Review A, 1991
- Temperature dependence of the ideal fracture strength of a b.c.c. crystalPhilosophical Magazine A, 1981
- Diffusional Viscosity of a Polycrystalline SolidJournal of Applied Physics, 1950
- Effect of Change of Scale on Sintering PhenomenaJournal of Applied Physics, 1950