Submicron CT of Composites
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Composite structure 3D imaging for strain and damage assessment
With the voxel size range of 170nm to 27 micros of the Zeiss Versa 520 it is possible to capture the geometric state of the components within a typical composite material. Together with University of Warwick, Simpact has applied this technique to capture 3D image data and developed the process to derive internal strains in pre-strained samples using Digital Volume Correlation. The PACET, Pre-strain Analysis of Composites using Emerging Technologies, project was sponsored by Innovate UK.
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PACET enabled Simpact to engineer composite materials to maximise their mechanical properties and make them suitable for use in demanding environments. We also identified the process to be valuable in the study of creep/relaxation of composites. This is relevant for structures that are subjected to high static load levels for a long duration, such as our composite piano, the ‘Carbiano’. We found that little information is readily available to predict required piano tuning intervals for a given engineering solution.
Furthermore, submicron CT imaging proves useful in the fatigue assessment of composites, another area of research that Simpact is involved in with WMG through a knowledge transfer partnership.
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