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15 mars 2022

Macroscopic mapping of microscale fibers in freeform injection molded fiber-reinforced composites using X-ray scattering tensor tomography

Prediction of the mechanical properties dictated by the local microfiber orientation is essential for the performance characterization of fiber-reinforced composites. Typically, tomographic imaging methods that provide fine spatial resolution are employed to investigate various materials' local micro- and nano-architecture in a non-destructive manner. However, conventional imaging techniques are limited by a substantial trade-off between the structure size of interest and the accessible field of view (FOV). Researchers from the TOMCAT beamline at Paul Scherrer Institut, Xnovo Technology ApS, and the Technical University of Denmark have demonstrated the potential of X-ray scattering tensor tomography for industrial applications by characterizing the microstructure of a centimeter-sized industrially relevant freeform injection molding fiber-reinforced composite sample (see Figure). This emerging technique provides unprecedented access to microstructural information over centimeter-sized sample volumes paving the way towards its potential integration as an invaluable tool, for instance, in the fiber-reinforced-composite (FRC) industry. The obtained fiber orientation and anisotropy information over statistically relevant large volumes can be used to predict the mechanical properties of final products, optimize production parameters, and improve fiber injection molding simulation frameworks. The work is published in Composites Part B: Engineering on 15 March 2022.

tensor_tomography
Tensor tomography reconstruction overview. A contour image based on the absorption contrast is shown in (a). An overview of the reconstructed local fiber vectors is shown in (b). The color represents the preferential orientation of the fibers in each voxel, and the color mapping ball is shown on the bottom right. Only subsampled voxels are shown for clear visualization. Scale bar: 1 cm.
Original Publication

 

Kim J, Slyamov A, Lauridsen E, Birkbak M, Ramos T, Marone F, et al., Macroscopic mapping of microscale fibers in freeform injection molded fiber-reinforced composites using X-ray scattering tensor tomography, Composites Part B: Engineering. 2022; 233: 109634 (11 pp.).

 

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Dr. Federica Marone
X-ray Tomography Group
Paul Scherrer Institut
+41 56 310 53 18
federica.marone@psi.ch
 
Prof. Dr. Marco Stampanoni
Photon Science Department, WBBA/216
Forschungsstrasse 111
CH-5232 Villigen
marco.stampanoni@psi.ch
 
 

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