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- Title
Crack interaction modelling.
- Authors
Meyer; Diegele; Brückner-Foit; Möslang
- Abstract
The growth characteristics of short fatigue cracks under axial loading were investigated using specimens of the ferritic–martensitic steel F82H-mod. Interest focused on crack propagation due to coalescence, which proved to be the dominant mechanism of crack growth. Crack propagation due to coalescence under a certain loading state is strongly influenced by the microstructure of the material on the one hand and by the interaction of cracks on the other. This study deals with an elasto-plastic fracture mechanics analysis of two interacting cracks neglecting the microstructural influence. Finite element calculations based on a Ramberg–Osgood model for the material properties were performed to quantify the interaction of two cracks in terms of an interaction function Y depending on the material and crack configuration. Finally, a neural network was trained to determine the interaction function for two cracks within the range of interest.
- Subjects
FERRITIC steel; METAL fatigue; STEEL fracture; ELASTOPLASTICITY
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2000, Vol 23, Issue 4, p315
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1046/j.1460-2695.2000.00283.x