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- W1581691721 abstract "Synchrotron X-ray microtomography imaging was used to study crack propagation taking into account the 3D nature of the crack morphology. A small loading device, which is directly mounted on the tomography set-up, enabled for in-situ loading and cycling of pre-cracked specimens. Scans were acquired during loading and unloading of the specimen to provide 3D images of the bulk in the vicinity of the crack at different fractions of the total propagation life. The tomographic images were subsequently treated by 3D Digital Image Correlation (DIC). DIC has already been used to measure Crack Opening Displacement (COD) and to estimate the corresponding stress intensity factor (SIF) value at the specimen surface [1]. However, up to now it has been performed in 2D only because 3D extensions of DIC are still new [2]. In the present work, the application of 3D-DIC to tomographic data allowed rapid retrieving of the displacement field in the bulk of the cracked specimen. From this displacement field, both the crack geometry and COD could be obtained. The above mentioned method was applied to specimens cut from different regions of larger fatigue precracked samples made of nodular graphite cast iron to study the influence of the stress state in the larger sample on further crack growth in the smaller specimens." @default.
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- W1581691721 date "2009-01-01" @default.
- W1581691721 modified "2023-10-16" @default.
- W1581691721 title "Three‐dimensional study of fatigue crack propagation using synchrotron X‐ray microtomography" @default.
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