Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
775976 | International Journal of Fatigue | 2006 | 8 Pages |
Abstract
Quasistatic propagation of a short edge crack, located within one grain of a bcc material has been studied using a discrete dislocation technique. The geometry is modelled by distributed dislocation dipole elements and the plasticity by discrete dislocations. The crack is assumed to grow through a single shear mechanism due to nucleation and annihilation of dislocations along preferred slip planes in the material. The change in growth rates due to different load cycles and due to a small single overload was investigated. It was found that the growth rates were strongly influenced by the applied load cycles, and that a single overload affects the growth differently depending on the number of cycles prior to the overload.
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Authors
P. Hansson, S. Melin,