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Halfen, Lukas
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Evaluation of digital volume correlation (DVC) applicability in silicon dioxide (SiO2) particle-doped carbon fibre reinforced polymers using in situ synchrotron radiation computed tomography (SRCT)
Abstract
Digital Volume Correlation is a powerful non-intrusive technique capable of full-field strain mapping of internal structures via displacement tracking. The principles of DVC have been successfully applied to unidirectional (UD) Carbon Fibre Reinforced Polymers (CFRPs) by doping with trackable particles (i.e. fiducial<br/>markers), thereby enabling strain mapping of materials with an inherent self-similar microstructure [1]. In this paper, the utility of Silicon Dioxide (SiO2) particle-doped CFRPs for DVC analysis is investigated. Compared to previous use of BaTiO3 particles, SiO2 is investigated on the basis of having established commercial use in CFRPs, whilst from an imaging perspective it will be less strongly attenuating. In this paper, DVC combined with in situ Synchrotron Radiation Computed Tomography (SRCT) is applied to SiO2–doped UD CFRPs under quasi-static tensile loading to explore the evolution of individually fractured 0° fibre into clusters of breaks. DVC strain uncertainties are quantified through stationary and rigid body displacement tests, with results being compared for BaTiO3 and SiO2 particle-doped materials.