“…Synchrotron radiation micro-CT (SR micro-CT) is known to serve as an accurate nondestructive tool for the 3D investigation of CFRP materials. In this study, SR micro-CT experiments were carried out with the SYRMEP beamline (Elettra Synchrotron, Trieste, Italy) [ 37 ] using a pink X-ray beam with a mean energy of 23.6 keV and exposure time of 100 ms. The sample–detector distance was set at 165 mm.…”
The investigation of destruction processes in composite materials is a current problem for their structural application and the improvement of their functional properties. This work aimed to visualize structural changes induced in layered carbon fiber reinforced plastics (CFRP) with the help of synchrotron X-ray microtomography. This article presents the details of destructive processes in the early stages of the deformation of reinforced polymers under uniaxial stretching, investigated at the micro level. Individual structural elements of the composite–filaments, parallel fiber bundles, the nonuniformity of the polymer binder distribution, and continuity defects–were observed under an external load. We have considered the influence of the material architecture and technological defects on fracture evolution in cross-ply and quasi-isotropic fiber-reinforced plastics. The results indicate the sequence of irreversible structural changes before the destruction of the material.
“…Synchrotron radiation micro-CT (SR micro-CT) is known to serve as an accurate nondestructive tool for the 3D investigation of CFRP materials. In this study, SR micro-CT experiments were carried out with the SYRMEP beamline (Elettra Synchrotron, Trieste, Italy) [ 37 ] using a pink X-ray beam with a mean energy of 23.6 keV and exposure time of 100 ms. The sample–detector distance was set at 165 mm.…”
The investigation of destruction processes in composite materials is a current problem for their structural application and the improvement of their functional properties. This work aimed to visualize structural changes induced in layered carbon fiber reinforced plastics (CFRP) with the help of synchrotron X-ray microtomography. This article presents the details of destructive processes in the early stages of the deformation of reinforced polymers under uniaxial stretching, investigated at the micro level. Individual structural elements of the composite–filaments, parallel fiber bundles, the nonuniformity of the polymer binder distribution, and continuity defects–were observed under an external load. We have considered the influence of the material architecture and technological defects on fracture evolution in cross-ply and quasi-isotropic fiber-reinforced plastics. The results indicate the sequence of irreversible structural changes before the destruction of the material.
“…The embedded mouse lung was scanned at the SYRMEP beamline (SYnchrotron Radiation for MEdical Physics) of the Italian synchrotron “Elettra” using the “white beam” setup with the following parameters: 1800 projection images over 180 , pixel size 4.4 m, sample-to-detector distance 450 mm and 1-mm silica filter resulting in an average x-ray photon energy of 19 keV (Dullin et al. 2021 ). Fig.…”
Mammalian pulmonary arteries divide multiple times before reaching the vast capillary network of the alveoli. Morphological analyses of the arterial branches can be challenging because more proximal branches are likely biologically distinct from more peripheral parts. Thus, it is useful to group the arterial branches into groups of coherent biology. While the generational approach of dichotomous branching is straightforward, the grouping of arterial branches in the asymmetrically branching monopodial lung is less clear. Several established classification methods return highly dissimilar groupings when employed on the same organ. Here, we established a workflow allowing the quantification of grouping results for the monopodial lung and tested various methods to group the branches of the arterial tree into coherent groups. A mouse lung was imaged by synchrotron x-ray microcomputed tomography, and the arteries were digitally segmented. The arterial tree was divided into its individual segments, morphological properties were assessed from corresponding light microscopic scans, and different grouping methods were employed, such as (fractal) generation or (Strahler) order. The results were ranked by the morphological similarity within and dissimilarity between the resulting groups. Additionally, a method from the mathematical field of cluster analysis was employed for creating a reference classification. In conclusion, there were significant differences in method performance. The Strahler order was significantly superior to the generation system commonly used to classify human lung structure. Furthermore, a clustering approach indicated more precise ways to classify the monopodial lung vasculature exist.
“…At Elettra, we started two decades ago a clinical program based on X-ray phase contrast imaging [ 55 ]. Dedicated initially to mammography, the SYRMEP beamline is now a cradle of multiscale biomedical imaging, bridging the gap between preclinical research and patient applications [ 56 ].…”
We present an overview of the Elettra-Sincrotrone Trieste research center, which hosts synchrotron and free-electron laser light sources. We review the current status, provide examples of recent achievements in basic and applied research and discuss the upgrade programs of the facility.
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