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Simulating small crack growth behaviour using crystal plasticity theory and finite element analysis
Predictions of small crack growth under cyclic loading in aluminium alloy 7075 are performed using finite element analysis (FEA), and results are compared with published experimental data. A double-slip crystal plasticity model is implemented within the analyses to enable the anisotropic nature of individual grains to be approximated. Small edge-cracks in a single grain with a starting length of 6 my m are incrementally grown following a noderelease scheme. Crack-tip opening displacements (CTOD) and crack opening stresses are calculated during the simulated crack growth, and da/dN against delta K diagrams are computed. Interactions between the crack tip and a grain boundary are also considered. The computations are shown to accurately capture the magnitude and the variability normally observed in small crack fatigue data.
Simulating small crack growth behaviour using crystal plasticity theory and finite element analysis
Predictions of small crack growth under cyclic loading in aluminium alloy 7075 are performed using finite element analysis (FEA), and results are compared with published experimental data. A double-slip crystal plasticity model is implemented within the analyses to enable the anisotropic nature of individual grains to be approximated. Small edge-cracks in a single grain with a starting length of 6 my m are incrementally grown following a noderelease scheme. Crack-tip opening displacements (CTOD) and crack opening stresses are calculated during the simulated crack growth, and da/dN against delta K diagrams are computed. Interactions between the crack tip and a grain boundary are also considered. The computations are shown to accurately capture the magnitude and the variability normally observed in small crack fatigue data.
Simulating small crack growth behaviour using crystal plasticity theory and finite element analysis
Potirniche, G.P. (author) / Daniewicz, S.R. (author) / Newman, J.C. jun. (author)
2004
13 Seiten, 45 Quellen
Article (Journal)
English
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