High temporal and spatial resolution dark-field imaging and mapping of real-time fibre break accumulation during continuous loading of struc

To achieve unprecedented time sequencing of fibre break accumulation in Carbon Fibre Reinforced Polymers (CFRPs) this experiment will use in situ dark field radiographic imaging in conjunction with post-mortem high resolution Computed Tomography (CT) to obtain uniquely fast, data-rich quantification of tensile failure. Fibre-break imaging to date has been too slow to reveal the chronology of breaks, particularly the formation of clusters thought to control final failure. Dark field imaging is an opportunity to obtain sufficient contrast from 2D radiography to detect damage, with ID19 offering the potential for break detection in the ms regime. We will use an established coupon geometry and test device, with two aerospace-grade laminates. Combining high-resolution free-space-propagation and lower-resolution dark-field imaging will enable observation of single fibre cracking dynamics as well as cluster evolution and damage accumulation in the entire stress area of the test specimens.