Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding
In the shipbuilding industry, the risk of brittle fractures is relatively high because some units operate in arctic or subarctic zones and use high thickness (up to 100 mm) steel plates in their structures. This risk is limited by employing certified materials with a specific impact strength, determ...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Sciendo
2022-09-01
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| Series: | Polish Maritime Research |
| Subjects: | |
| Online Access: | https://doi.org/10.2478/pomr-2022-0036 |
| _version_ | 1811319892509458432 |
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| author | Kowalski Jakub Kozak Janusz |
| author_facet | Kowalski Jakub Kozak Janusz |
| author_sort | Kowalski Jakub |
| collection | DOAJ |
| description | In the shipbuilding industry, the risk of brittle fractures is relatively high because some units operate in arctic or subarctic zones and use high thickness (up to 100 mm) steel plates in their structures. This risk is limited by employing certified materials with a specific impact strength, determined using the Charpy method (for a given design temperature) and by exercising control over the welding processes (technology qualification, production supervision, and non-destructive tests). However, for offshore constructions, such requirements may prove insufficient. For this reason, regulations employed in constructing offshore structures require conducting crack tip opening displacement (CTOD) tests for steel and welded joints with thicknesses exceeding 40 mm for high tensile strength steel and 50 mm for other steel types. Since classification codes do not accept the results of CTOD tests conducted on specimens of sub-sized dimensions, the problem of theoretically modelling the steel construction destruction process is of key importance, as laboratory tests for notched elements of considerable thickness (100 mm and higher) are costly and problems stemming from high loads and a wide range of recorded parameters are not uncommon. The aim of this research is to find a relationship between material thickness and CTOD value, by establishing and verifying a numerical model that allows recalculating a result obtained on a sub-size specimen to a full- size specimen for a ductile fracture mode. This work presents results and conclusions from numerical modelling and compares them with laboratory test results of the elastic-plastic properties of high thickness steel, typically used in offshore applications. |
| first_indexed | 2024-04-13T12:50:09Z |
| format | Article |
| id | doaj.art-5120e749768b40dfa749f1db48786502 |
| institution | Directory Open Access Journal |
| issn | 2083-7429 |
| language | English |
| last_indexed | 2024-04-13T12:50:09Z |
| publishDate | 2022-09-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Polish Maritime Research |
| spelling | doaj.art-5120e749768b40dfa749f1db487865022022-12-22T02:46:14ZengSciendoPolish Maritime Research2083-74292022-09-0129316016610.2478/pomr-2022-0036Influence of Material Thickness on the Ductile Fracture of Steel Plates for ShipbuildingKowalski Jakub0Kozak Janusz1Gdansk University of Technology, PolandGdansk University of Technology, PolandIn the shipbuilding industry, the risk of brittle fractures is relatively high because some units operate in arctic or subarctic zones and use high thickness (up to 100 mm) steel plates in their structures. This risk is limited by employing certified materials with a specific impact strength, determined using the Charpy method (for a given design temperature) and by exercising control over the welding processes (technology qualification, production supervision, and non-destructive tests). However, for offshore constructions, such requirements may prove insufficient. For this reason, regulations employed in constructing offshore structures require conducting crack tip opening displacement (CTOD) tests for steel and welded joints with thicknesses exceeding 40 mm for high tensile strength steel and 50 mm for other steel types. Since classification codes do not accept the results of CTOD tests conducted on specimens of sub-sized dimensions, the problem of theoretically modelling the steel construction destruction process is of key importance, as laboratory tests for notched elements of considerable thickness (100 mm and higher) are costly and problems stemming from high loads and a wide range of recorded parameters are not uncommon. The aim of this research is to find a relationship between material thickness and CTOD value, by establishing and verifying a numerical model that allows recalculating a result obtained on a sub-size specimen to a full- size specimen for a ductile fracture mode. This work presents results and conclusions from numerical modelling and compares them with laboratory test results of the elastic-plastic properties of high thickness steel, typically used in offshore applications.https://doi.org/10.2478/pomr-2022-0036ductilitytoughnessplasticityctod |
| spellingShingle | Kowalski Jakub Kozak Janusz Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding Polish Maritime Research ductility toughness plasticity ctod |
| title | Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding |
| title_full | Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding |
| title_fullStr | Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding |
| title_full_unstemmed | Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding |
| title_short | Influence of Material Thickness on the Ductile Fracture of Steel Plates for Shipbuilding |
| title_sort | influence of material thickness on the ductile fracture of steel plates for shipbuilding |
| topic | ductility toughness plasticity ctod |
| url | https://doi.org/10.2478/pomr-2022-0036 |
| work_keys_str_mv | AT kowalskijakub influenceofmaterialthicknessontheductilefractureofsteelplatesforshipbuilding AT kozakjanusz influenceofmaterialthicknessontheductilefractureofsteelplatesforshipbuilding |