In this project, Simpleware software was used to convert CT data into finite element models suitable for simulating the effect of porosity on the elastic properties of synthetic graphite in COMSOL Multiphysics®. Porosity is formed in synthetic graphite during processing, and can have a significant effect upon its industrial performance. X-ray tomography was used to obtain a stack of images of synthetic graphite that could be processed and meshed as 3D computational models in Simpleware. The study’s successful use of FEM to help characterise synthetic graphite provides insight into how Simpleware software can contribute to a straightforward workflow for analysing composite material performance in COMSOL and other solvers.
GrafTech International Holdings Inc., Parma, Ohio, USA:
G. Sowa • R. Paul • R.E Smith
A stack of X-ray computed tomography images were imported into ScanIP. 2D slices were immediately rendered in 3D after import, and rapidly segmented using automated thresholding tools into solid and porous regions. Segmentation was carried out based on greyscale scan values. Colour mapping was also used to better visualise porous and solid regions.
Simpleware +FE was then used to convert the solid part of the segmented image data into a robust, analysis-ready mesh. Experiments were conducted with FE Grid and FE Free options to obtain an optimum mesh quality with sufficient elements for a high resolution model. Efforts were also made to maintain a reasonable computing time when meshing. The final volume mesh was directly imported into COMSOL Multiphysics® for simulation.