Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens
The increasing demand of energy prompts the petroleum industry exploitation activities to the Arctic region where the low temperature is a strong challenge, both for structural design and material selection. For structural materials exhibiting the Lüders plateau, it has been reported that lowering t...
Published in: | International Journal of Fracture |
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Online Access: | http://hdl.handle.net/11250/2577675 https://doi.org/10.1007/s10704-018-0327-2 |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2577675 2023-05-15T14:59:22+02:00 Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens Tu, Shengwen Ren, Xiaobo He, Jianying Zhang, Zhiliang 2018 http://hdl.handle.net/11250/2577675 https://doi.org/10.1007/s10704-018-0327-2 eng eng Springer Verlag urn:issn:0376-9429 http://hdl.handle.net/11250/2577675 https://doi.org/10.1007/s10704-018-0327-2 cristin:1627860 International Journal of Fracture Journal article 2018 ftntnutrondheimi https://doi.org/10.1007/s10704-018-0327-2 2019-09-17T06:54:32Z The increasing demand of energy prompts the petroleum industry exploitation activities to the Arctic region where the low temperature is a strong challenge, both for structural design and material selection. For structural materials exhibiting the Lüders plateau, it has been reported that lowering the temperature will increase the Lüders plateau length. In order to obtain a deep understanding of the Lüders plateau effect on ductile crack growth resistance, we performed numerical analyses with SENT specimens and the Gurson damage model. The Lüders plateau was simplified by keeping the flow stress constant and varying the plateau length. The results show that the existence of the Lüders plateau does not influence the initiation toughness, however, will alter the material’s fracture resistance significantly. It is found that the Lüders plateau effect is in general controlled by the stress triaxiality level in front of the crack tip. Both the strain hardening and the crack depth effects on resistance curves are alleviated due to the Lüders plateau. For materials with very small initial void volume fraction, the Lüders plateau effect is more pronounced. Since the Lüders plateau intensifies the crack driving force and may lower down crack resistance curve, special attention should be paid to the application of materials with the Lüders plateau in the Arctic. submittedVersion This is a pre-print of an article published in [ International Journal of Fracture ]. The final authenticated version is available online at: https://doi.org/10.1007/s10704-018-0327-2 Article in Journal/Newspaper Arctic NTNU Open Archive (Norwegian University of Science and Technology) Arctic International Journal of Fracture 214 2 185 200 |
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Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
The increasing demand of energy prompts the petroleum industry exploitation activities to the Arctic region where the low temperature is a strong challenge, both for structural design and material selection. For structural materials exhibiting the Lüders plateau, it has been reported that lowering the temperature will increase the Lüders plateau length. In order to obtain a deep understanding of the Lüders plateau effect on ductile crack growth resistance, we performed numerical analyses with SENT specimens and the Gurson damage model. The Lüders plateau was simplified by keeping the flow stress constant and varying the plateau length. The results show that the existence of the Lüders plateau does not influence the initiation toughness, however, will alter the material’s fracture resistance significantly. It is found that the Lüders plateau effect is in general controlled by the stress triaxiality level in front of the crack tip. Both the strain hardening and the crack depth effects on resistance curves are alleviated due to the Lüders plateau. For materials with very small initial void volume fraction, the Lüders plateau effect is more pronounced. Since the Lüders plateau intensifies the crack driving force and may lower down crack resistance curve, special attention should be paid to the application of materials with the Lüders plateau in the Arctic. submittedVersion This is a pre-print of an article published in [ International Journal of Fracture ]. The final authenticated version is available online at: https://doi.org/10.1007/s10704-018-0327-2 |
format |
Article in Journal/Newspaper |
author |
Tu, Shengwen Ren, Xiaobo He, Jianying Zhang, Zhiliang |
spellingShingle |
Tu, Shengwen Ren, Xiaobo He, Jianying Zhang, Zhiliang Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens |
author_facet |
Tu, Shengwen Ren, Xiaobo He, Jianying Zhang, Zhiliang |
author_sort |
Tu, Shengwen |
title |
Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens |
title_short |
Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens |
title_full |
Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens |
title_fullStr |
Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens |
title_full_unstemmed |
Numerical study on the effect of the Lüders plateau on the ductile crack growth resistance of SENT specimens |
title_sort |
numerical study on the effect of the lüders plateau on the ductile crack growth resistance of sent specimens |
publisher |
Springer Verlag |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2577675 https://doi.org/10.1007/s10704-018-0327-2 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
International Journal of Fracture |
op_relation |
urn:issn:0376-9429 http://hdl.handle.net/11250/2577675 https://doi.org/10.1007/s10704-018-0327-2 cristin:1627860 |
op_doi |
https://doi.org/10.1007/s10704-018-0327-2 |
container_title |
International Journal of Fracture |
container_volume |
214 |
container_issue |
2 |
container_start_page |
185 |
op_container_end_page |
200 |
_version_ |
1766331483720515584 |