Multi-scale modeling of microstructure dependent intergranular brittle fracture using a quantitative phase-field based method

[Display omitted] The fracture behavior of brittle materials is strongly influenced by their underlying microstructure that needs explicit consideration for accurate prediction of fracture properties and the associated scatter. In this work, a hierarchical multi-scale approach is pursued to model mi...

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Bibliographic Details
Published in:Computational materials science 2016-02, Vol.113, p.38-52
Main Authors: Chakraborty, Pritam, Zhang, Yongfeng, Tonks, Michael R.
Format: Article
Language:English
Subjects:
Brittle fracture
Calibration
Computer simulation
Crack propagation
Fracture mechanics
Intergranular fracture
Mathematical models
Microstructure
Molecular dynamics
Multi-length-scale
Phase-field model
Uranium dioxide
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Summary:[Display omitted] The fracture behavior of brittle materials is strongly influenced by their underlying microstructure that needs explicit consideration for accurate prediction of fracture properties and the associated scatter. In this work, a hierarchical multi-scale approach is pursued to model microstructure sensitive brittle fracture. A quantitative phase-field based fracture model is utilized to capture the complex crack growth behavior in the microstructure and the related parameters are calibrated from lower length scale atomistic simulations instead of engineering scale experimental data. The workability of this approach is demonstrated by performing porosity dependent intergranular fracture simulations in UO2 and comparing the predictions with experiments.
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2015.11.010