TY - GEN
T1 - Modeling fatigue crack growth in crystalline solids with discrete dislocation plasticity
AU - Balint, D. S.
AU - Deshpande, V. S.
AU - Needleman, A.
AU - Van Der Giessen, E.
PY - 2005
Y1 - 2005
N2 - Analyses of crack growth under cyclic loading conditions are discussed where plastic flow arises from the motion of large numbers of discrete dislocations and the fracture properties are embedded in a cohesive surface constitutive relation. The formulation is the same as used to analyse crack growth under monotonic loading conditions, differing only in the remote loading being a cyclic function of time. Fatigue, i.e. crack growth in cyclic loading at a driving force for which the crack would have arrested under monotonic loading, emerges in the simulations as a consequence of the evolution of internal stresses associated with the irreversibility of the dislocation motion. A fatigue threshold, Paris law behaviour, striations, the accelerated growth of short cracks and the scaling with material properties are outcomes of the calculations. Results for single crystals and polycrystals will be discussed.
AB - Analyses of crack growth under cyclic loading conditions are discussed where plastic flow arises from the motion of large numbers of discrete dislocations and the fracture properties are embedded in a cohesive surface constitutive relation. The formulation is the same as used to analyse crack growth under monotonic loading conditions, differing only in the remote loading being a cyclic function of time. Fatigue, i.e. crack growth in cyclic loading at a driving force for which the crack would have arrested under monotonic loading, emerges in the simulations as a consequence of the evolution of internal stresses associated with the irreversibility of the dislocation motion. A fatigue threshold, Paris law behaviour, striations, the accelerated growth of short cracks and the scaling with material properties are outcomes of the calculations. Results for single crystals and polycrystals will be discussed.
UR - http://www.scopus.com/inward/record.url?scp=84869791562&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84869791562
SN - 9781617820632
T3 - 11th International Conference on Fracture 2005, ICF11
SP - 2517
EP - 2521
BT - 11th International Conference on Fracture 2005, ICF11
PB - International Congress on Fracture (ICF)
T2 - 11th International Conference on Fracture 2005, ICF11
Y2 - 20 March 2005 through 25 March 2005
ER -