About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Experimental-numerical Analysis of the Correlation Between the Stress & Strain Fields Induced by the Graphite Particles and the Crack Nucleation and Propagation Path in Ductile Cast Iron |
Author(s) |
Tito Andriollo, Yubin Zhang, Søren Fæster, Jesper Hattel, Varvara Kouznetsova |
On-Site Speaker (Planned) |
Tito Andriollo |
Abstract Scope |
Accurate prediction of the fatigue properties of ductile cast iron components is crucial in sectors like transport and energy production. So far, mainly empirical methods have been used to correlate the primary microstructural parameters, i.e. size and distribution of the graphite particles, to the crack nucleation and growth rate under cyclic loading. To attempt a micro-mechanical interpretation, a 3D finite element model of the region surrounding the crack tip in a compact tension specimen is created. The model consists of an internal region where the microstructure reconstructed with computed tomography – matrix plus graphite particles – is discretized and a homogenized external region where displacement boundary conditions measured via digital image correlation are applied. The results reveal the existence of a correlation between the crack nucleation site and the plastic strain accumulated during each cycle. In addition, a weaker correlation between crack propagation direction and maximum principal stress is found. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |