Proceedings of the Royal Society of London A Mathematical and Physical Sciences · 1954 · 655 citations · 6 references
EngineeringMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsMetallurgySolid MechanicsDislocation MechanicsDislocation TheoryFracture InitiationFracture MechanicsFracture PropagationPlastic DeformationCrack FormationCrack InitiationDislocation MechanismsDislocation-based PlasticityEquilibriumPlastic FlowStress
Abstract The stresses round a piled-up group of dislocations are investigated with reference to the initiation of a crack. A crack should form when the group consists of about 1000 dislocations piled up under a stress of the magnitude occurring in a cold-worked metal. The stress system due to the crack is obtained. The crack will have a stable equilibrium length, but this length is likely to be determined by the amount of plastic flow which takes place round the tip of the crack.
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