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WELCOME

WELCOME. Department MTM , MATERIALS PERFORMANCE AND NON-DESTRUCTIVE TESTING Katholieke Universiteit Leuven Belgium. µCT equipment at MTM. Skyscan 1072 0-130 kV, 0-300 µA, microfocal spot size 10 µm (10 Watt) / 30-40 µm (40 Watt)

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WELCOME

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  1. WELCOME Department MTM, MATERIALS PERFORMANCE AND NON-DESTRUCTIVE TESTING Katholieke Universiteit Leuven Belgium

  2. µCT equipment at MTM • Skyscan 1072 • 0-130 kV, 0-300 µA, microfocal spot size 10 µm (10 Watt) / 30-40 µm (40 Watt) • X-Ray detector Cooled CCD-sensor 1024 x 1024 pixels, 10 bit dynamic range • Object manipulator 400 mm linear movement • 20 mm lifting, 2 µm step size, 360° rotation, 0.45° step size • AEA Tomohawk on the Philips HOMX 161 • X-Ray source (Philips HOMX 161) • Focal spot 5 to 200 µm • Voltage range 5 - 160 kV, current up to 3,2 mA as low as 0,03 mA • Distance source-object 15 mm to 920 mm, distance source-image intensifier 520-1500 mm • Image intensifier TH 9428HX with field of view 220 mm / 170 mm / 115 mm • X-Ray detector CCD-sensor 1024 x 1024 pixels, 10 bit dynamic range ADIMEC MX12P • Object manipulators HOMX 161 X-Ray detector movement, object X, Y and Z movement • Servostep 1700 Object rotation 0.01° step size and object X movement 1 µm stepsize

  3. Achievements • Filters in front of X-ray source or in front of detector • Dual energy procedures • Image enhancement programmes (denoising, missing lines, …) • Programmes for quantitative data deduction from µCT images • See more in presentations of today…..

  4. Data acquisition • Images are converted to binary images using a simple threshold value

  5. 1 2 z z z z 3 y y y y 4 5 x x x x Inlet B.C. Outlet Image analysis Geometry / Image processing Segmentation Thresholding CT-Image (grey-scale) Binary voxel representation Pore map Vectorisation Geometrical parameter Fluid viscosity introduced arbitrarily Computing overall conductivities Computingconductivities Graph of the pore network Graph of the pore network with k’s assigned Overall conductivity

  6. Skeleton • Based on voronoï diagram; • Gives information about local sizes in the pore space;

  7. Segmentation • Place maximum balls in the pore space • Make them grow as balloon in tubes

  8. Vectorization • Each pore is represented by its center with its • Volume • Aperture • Connectivity with its neighbors

  9. Pore network representation • A local hydraulic conductivity is associated to each pore using Poiseuille law, depending on the sizes of pores • Two sets of pore are selected for input and output.

  10. measured computed Along warp, K1 1.790.40 1.52 Along weft, K2 1.430.30 1.06 Ratio K1/K2 1.25 1.43 Through the thickness - 0.0065 Computed and measured permeability, 10-10 m2 Results Glass laminate 7*6*2.2 cm 350*300*110 voxel (pixel size: 20 m)

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