Wigger, T;
Lin, B;
Lupton, C;
Marrow, J;
Tong, J;
(2019)
A 3D full-field study of cracks in a nuclear graphite under mode I and mode II cyclic dwell loading conditions.
Fatigue & Fracture of Engineering Materials & Structures
, 43
(8)
pp. 1646-1657.
10.1111/ffe.13183.
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Abstract
Three‐dimensional (3D) full‐field deformation around crack tips in a nuclear graphite has been studied under mode I and mode II cyclic dwell loading conditions using digital volume correlation (DVC) and integrated finite element (FE) analysis. A cracked Brazilian disk specimen of Gilsocarbon graphite was tested at selected loading angles to achieve mode I and mode II cyclic dwell loading conditions. Integrated FE analysis was carried out with the 3D displacement fields measured by DVC injected into the FE model, from which the crack driving force J‐integral was obtained using a damaged plasticity material model. The evolution of near‐tip strains and the J‐integral during the cyclic dwell loading was examined. Under cyclic dwell, residual strain accumulation was observed for the first time. The results shed some light on the effect of dwell time on the 3D crack deformation and crack driving force in Gilsocarbon under cyclic mode I and II loading conditions.
| Type: | Article |
|---|---|
| Title: | A 3D full-field study of cracks in a nuclear graphite under mode I and mode II cyclic dwell loading conditions |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/ffe.13183 |
| Publisher version: | https://doi.org/10.1111/ffe.13183 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Engineering, Mechanical, Materials Science, Multidisciplinary, Engineering, Materials Science, cyclic loading, DVC, dwell, graphite, mode I, mode II, residual strain, strain accumulation, POLYGRANULAR GRAPHITE, FRACTURE-BEHAVIOR, STRESS-ANALYSIS, STRAIN, FATIGUE, REACTOR, DAMAGE, PROPAGATION, SITU, FAILURE |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10108770 |
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