The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements
Abstract In elements of steel structures working at low temperatures, there is a risk of appearance of brittle fracture. This risk is reduced through the use of certified materials having guaranteed strength at a given temperature. A method which is most frequently used to determine brittle fracture...
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Walter de Gruyter GmbH
2018
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crdegruyter:10.2478/pomr-2018-0058 2024-06-23T07:50:28+00:00 The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements Kowalski, Jakub Kozak, Janusz 2018 http://dx.doi.org/10.2478/pomr-2018-0058 https://content.sciendo.com/view/journals/pomr/25/2/article-p85.xml https://www.sciendo.com/pdf/10.2478/pomr-2018-0058 en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/4.0 Polish Maritime Research volume 25, issue 2, page 85-91 ISSN 2083-7429 journal-article 2018 crdegruyter https://doi.org/10.2478/pomr-2018-0058 2024-06-11T04:05:14Z Abstract In elements of steel structures working at low temperatures, there is a risk of appearance of brittle fracture. This risk is reduced through the use of certified materials having guaranteed strength at a given temperature. A method which is most frequently used to determine brittle fracture toughness is the Charpy impact test, preformed for a given temperature. For offshore structures intended to work in the arctic climate, the certifying institutions more and more often require Crack Tip Opening Displacement (CTOD) tests instead of conventional impact tests, especially for steel and welded joints of more than 40 mm in thickness in the case of high-strength steel, and more than 50 mm for the remaining steels. The geometry of specimens and the test procedure are standardised; however, these standards provide some margin for specimen notch depth. The paper analyses the effect of notch depth difference, within the range permitted by the standards, on the recorded CTOD values of a given material. The analysis was performed via numerical modelling of destruction of specimens with different notch geometries and further verification of the obtained numerical results in laboratory tests. The calculations were carried out at the Academic Computer Centre in Gdansk. Article in Journal/Newspaper Arctic De Gruyter Arctic Polish Maritime Research 25 2 85 91 |
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English |
description |
Abstract In elements of steel structures working at low temperatures, there is a risk of appearance of brittle fracture. This risk is reduced through the use of certified materials having guaranteed strength at a given temperature. A method which is most frequently used to determine brittle fracture toughness is the Charpy impact test, preformed for a given temperature. For offshore structures intended to work in the arctic climate, the certifying institutions more and more often require Crack Tip Opening Displacement (CTOD) tests instead of conventional impact tests, especially for steel and welded joints of more than 40 mm in thickness in the case of high-strength steel, and more than 50 mm for the remaining steels. The geometry of specimens and the test procedure are standardised; however, these standards provide some margin for specimen notch depth. The paper analyses the effect of notch depth difference, within the range permitted by the standards, on the recorded CTOD values of a given material. The analysis was performed via numerical modelling of destruction of specimens with different notch geometries and further verification of the obtained numerical results in laboratory tests. The calculations were carried out at the Academic Computer Centre in Gdansk. |
format |
Article in Journal/Newspaper |
author |
Kowalski, Jakub Kozak, Janusz |
spellingShingle |
Kowalski, Jakub Kozak, Janusz The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements |
author_facet |
Kowalski, Jakub Kozak, Janusz |
author_sort |
Kowalski, Jakub |
title |
The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements |
title_short |
The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements |
title_full |
The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements |
title_fullStr |
The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements |
title_full_unstemmed |
The Effect of Notch Depth on CTOD Values in Fracture Tests of Structural Steel Elements |
title_sort |
effect of notch depth on ctod values in fracture tests of structural steel elements |
publisher |
Walter de Gruyter GmbH |
publishDate |
2018 |
url |
http://dx.doi.org/10.2478/pomr-2018-0058 https://content.sciendo.com/view/journals/pomr/25/2/article-p85.xml https://www.sciendo.com/pdf/10.2478/pomr-2018-0058 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Polish Maritime Research volume 25, issue 2, page 85-91 ISSN 2083-7429 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0 |
op_doi |
https://doi.org/10.2478/pomr-2018-0058 |
container_title |
Polish Maritime Research |
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25 |
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2 |
container_start_page |
85 |
op_container_end_page |
91 |
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1802641377565081600 |