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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Defects and Properties of Cast Metals IV
Presentation Title Probabilistic multiscale finite element model for predicting strength and fracture strain of cast Al-Si-Mg alloy
Author(s) Woojin Jeong, Chanyang Kim, Chung-An Lee, Hyukjong Bong, Seung-Hyun Hong, Myoung-Gyu Lee
On-Site Speaker (Planned) Myoung-Gyu Lee
Abstract Scope The strength and ductility of cast Al-Si-Mg alloy are predicted from a multi-scale finite element model that integrates the Mori-Tanaka (MT) mean field homogenization and the Gurson-Tvergaard-Needleman (GTN) ductile fracture model. The MT mean field method calculates the stress of Si particle embedded in the aluminum matrix and the nucleation of void is determined if the stress satisfies a critical failure value. The nucleated voids from the cracked Si particles grow and finally initiate the ductile fracture of matrix under the scheme of GTN approach. Moreover, the cracking of Si particles is identified by applying the Weibull distribution function, which reproduces the probabilistic characteristics of failure under various stress states. The developed finite element model is validated by predicting the tensile failure strengths and strains of different geometries of specimens covering shear to biaxial modes. The comparison shows reasonably good agreement with experimental failure data.
Proceedings Inclusion? Planned:
Keywords Aluminum, Modeling and Simulation, Mechanical Properties

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