Edge illumination X-ray phase contrast imaging for impact damage detection in CFRP

Virtual grating approach for Monte Carlo simulations of edge illumination-based x-ray phase contrast imaging

“…This transition has been achieved in particular for grating-based interferometry (GBI) [2] and edge illumination (EI) [3,4]. A natural consequence of this evolution is that the research field is becoming increasingly oriented towards the development of real-world applications, such as non-destructive testing [5,6], security [7,8] and (bio)medical imaging [9,10,11]. Among these examples, medical XPCI is arguably the most acclaimed, even more so since the recent demonstration of medical x-ray dark field (DF) imaging of human lungs with a GBI-based system [12].…”

X-ray dark-field tomography using edge-illumination

“…Dark-field imaging is a novel imaging modality where contrast arises from ultra-small angle x-ray scattering within the sample, [1][2][3] which occurs when there are density fluctuations within the microstructure of the sample, such as fibres, pores, bubbles, cracks, powder or sharp edges. [4][5][6][7][8][9] Such scatterers have dimensions smaller than the system resolution as dark-field imaging probes information from unresolvable sample features. Consequently, a dark-field imaging system with a typical pixel size of approximately 100µm can represent a centimetre-sized object based on its micro and nanostructure.…”

Visualization and quantification of low-velocity impact damage of three-dimensional braided CFRP composites by micro-computed tomography

“…In those service conditions, composites often bear low-velocity impact (LVI) loads with different energies, inducing barely visible impact damage (BVID). This phenomenon significantly deteriorates the overall damage tolerance and durability [ 5 , 6 ]. Hence, to improve the reliability of components, visualized and quantified evaluation of low-velocity impact damage in 3D braided composites is required.…”