Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study
In this work, the cracking behavior of tungsten under edge-localized mode (ELM)-like thermal shock loads was investigated on the basis of a rigorous computational fracture mechanical analysis combined with the finite element method. Typical transient thermal shock loads of ELM conditions were consid...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2015-03-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179114200044 |
| _version_ | 1818141834781655040 |
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| author | Muyuan Li Ewald Werner Jeong-Ha You |
| author_facet | Muyuan Li Ewald Werner Jeong-Ha You |
| author_sort | Muyuan Li |
| collection | DOAJ |
| description | In this work, the cracking behavior of tungsten under edge-localized mode (ELM)-like thermal shock loads was investigated on the basis of a rigorous computational fracture mechanical analysis combined with the finite element method. Typical transient thermal shock loads of ELM conditions were considered with a relevant range of power density and base temperature for a loading duration of 1 ms. Crack initiation and progressive growth were predicted using the extended finite element method and the J-integral was calculated for the assumed precrack by means of the virtual crack extension method. For a power density of 1 GW/m2 and higher, a crack is preferably initiated near the edge of the loading area and is then followed by a gradual horizontal kinking, parallel to the loading surface. The crack formation is predicted for the power density of 0.6 GW/m2 and above, and when the base temperature is higher than 600 °C, almost no cracks is predicted. The numerically predicted cracking behavior agrees in general with the experimental observations. |
| first_indexed | 2024-12-11T11:06:11Z |
| format | Article |
| id | doaj.art-c93f1bc530ea4ca691c68dc0a259e774 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-11T11:06:11Z |
| publishDate | 2015-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-c93f1bc530ea4ca691c68dc0a259e7742022-12-22T01:09:41ZengElsevierNuclear Materials and Energy2352-17912015-03-012C11110.1016/j.nme.2014.10.001Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational studyMuyuan Li0Ewald Werner1Jeong-Ha You2Lehrstuhl für Werkstoffkunde und Werkstoffmechanik, Technische Universität München, Boltzmannstr.15, 85748 Garching, GermanyLehrstuhl für Werkstoffkunde und Werkstoffmechanik, Technische Universität München, Boltzmannstr.15, 85748 Garching, GermanyMax-Planck-Institut für Plasmaphysik, Boltzmannstr.2, 85748 Garching, GermanyIn this work, the cracking behavior of tungsten under edge-localized mode (ELM)-like thermal shock loads was investigated on the basis of a rigorous computational fracture mechanical analysis combined with the finite element method. Typical transient thermal shock loads of ELM conditions were considered with a relevant range of power density and base temperature for a loading duration of 1 ms. Crack initiation and progressive growth were predicted using the extended finite element method and the J-integral was calculated for the assumed precrack by means of the virtual crack extension method. For a power density of 1 GW/m2 and higher, a crack is preferably initiated near the edge of the loading area and is then followed by a gradual horizontal kinking, parallel to the loading surface. The crack formation is predicted for the power density of 0.6 GW/m2 and above, and when the base temperature is higher than 600 °C, almost no cracks is predicted. The numerically predicted cracking behavior agrees in general with the experimental observations.http://www.sciencedirect.com/science/article/pii/S2352179114200044Extended finite element methodThermal shock experimentsJ-integralCracking thresholdTungsten cracking |
| spellingShingle | Muyuan Li Ewald Werner Jeong-Ha You Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study Nuclear Materials and Energy Extended finite element method Thermal shock experiments J-integral Cracking threshold Tungsten cracking |
| title | Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study |
| title_full | Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study |
| title_fullStr | Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study |
| title_full_unstemmed | Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study |
| title_short | Cracking behavior of tungsten armor under ELM-like thermal shock loads: A computational study |
| title_sort | cracking behavior of tungsten armor under elm like thermal shock loads a computational study |
| topic | Extended finite element method Thermal shock experiments J-integral Cracking threshold Tungsten cracking |
| url | http://www.sciencedirect.com/science/article/pii/S2352179114200044 |
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