Abstract
In this work, the local fracture initiation behaviour of an Al2O3/6061Al composite is studied numerically. The damage behaviour of the microstructure is evaluated in consideration of the path and the amount of damage as well as the stress–strain performance of the microstructure. The damage behaviour of the ductile matrix has been simulated using the damage parameter D. For the simulation of fracture of the ceramic particles, a normal stress criterion is applied. For the analysis of the damage behaviour of the transition zone between particulate and matrix, both damage models (D parameter and normal stress criteria) are applied in this region. Parameter studies of crack propagation prediction in the Al2O3/6061Al composite on the basis of an Element Elimination technique have been performed for two differently heat-treated variants resulting in different mechanical properties. In addition, residual stress effects on the damage behaviour are examined for various microstructural situations.
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The authors are thankful for the financial support from German Research Foundation (DFG), under project Schm 746/55-1.
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Lasko, G., Weber, U. & Schmauder, S. Finite Element Simulations of Crack Propagation in Al2O3/6061Al Composites. Acta Metall. Sin. (Engl. Lett.) 27, 853–861 (2014). https://doi.org/10.1007/s40195-014-0124-5
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DOI: https://doi.org/10.1007/s40195-014-0124-5