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1 Zeszyty Naukowe. Mechanika / Politechnika Opolska

1 2005

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Load range influence of a short propagating edge crack using the discrete dislocation technique

Hansson P., Melin S.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2005

z. 82

107-114

The influence of different load cycles on the growth of a short edge crack has been studied using a discrete dislocation technique. The external boundary is modeled with dislocation dipole elements and the plasticity is modeled by discrete dislocations. The crack is located within one grain in a bcc material, and is assumed to grow through a single shear mechanism, due to nucleation and annihilation of discrete dislocations along preferred slip planes. It was found that the applied maximum load in the cycle strongly affected the growth behavior of the crack, both in the case of constant minimum load and the case of constant load range.