A multiscale modelling of polycrystalline nuclear graphite under effect of microcracks and incomplete-graphitized regions
Source abstract
Abstract
Polycrystalline nuclear graphite has a complex internal structure with different length scale spanned from microscale to macroscale. In the past several 2D polycrystalline models had been developed to study mechanical behaviours of polycrystalline graphite and estimate its material properties. However, graphite crystallite is a 3D structure with anisotropic material properties hence these 2D models may give incorrect predictions. In this work, multiscale models for 2D and 3D have been developed to study the microstructures and material properties of polycrystalline graphite. The number of crystallites, texture, microcracks and incomplete-graphitized components have been considered in the models. Our results indicate that both microcracks and incomplete-graphitized have a significant effect on CTE and stiffness of polycrystalline. The results from the 2D multiscale model confirm that it is inappropriate to use 2D models for polycrystalline graphite. The final 3D multiscale model can provide a way to predict the material properties of polycrystalline graphite.Graphical abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphite, nuclear technology, radiation studies · Nuclear and radioactivity studies · Radiation Shielding Materials Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
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