Numerical model of plastic destruction of thick steel structural elements

• Autorzy: Kowalski J. , Kozak J.

Identyfikatory

DOI

10.2478/pomr-2018-0057

• Języki publikacji: EN

Abstrakty

EN

In the shipbuilding industry, the risk of brittle fracture of the structure is limited by using certified materials with specified impact strength, determined by the Charpy method (for a given design temperature) and by supervising the welding processes (technology qualification, production supervision, non-destructive testing). For off-shore constructions, classical shipbuilding requirements may not be sufficient. Therefore, the regulations used in the construction of offshore structures require CTOD tests for steel and welded joints with a thickness greater than 40 mm in the case of high strength steel and more than 50 mm in the case of other steels. Classification societies do not accept CTOD test results of samples with a thickness less than the material tested. For this reason, the problem of theoretical modeling of steel structure destruction process is a key issue, because laboratory tests for elements with high thickness (in the order of 100 mm and more) with a notch are expensive (large samples, difficulties in notching), and often create implementation difficulties due to required high load and range of recorded parameters. The publication will show results and conclusions from numerical modeling of elastic properties for steel typical for offshore applications. Calculations were carried out at the Academic Computer Centre in Gdańsk.

Słowa kluczowe

EN

impact strength; numerical modelling; steel structural elements

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2018
• Tom: nr 2
• Strony: 78--84
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Kowalski J.

• Gdansk University of Technology Faculty of Ocean Engineering and Ship Technology Narutowicza 11/12 80-233 Gdansk Poland

autor

Kozak J.

• Gdansk University of Technology Faculty of Ocean Engineering and Ship Technology Narutowicza 11/12 80-233 Gdansk Poland

Bibliografia

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• 2. Lloyd’s Register of Shipping,, Rules for the Manufacture, Testing and Certification of Materials,, London: Lloyd’s Register of Shipping, 2015., 2015.
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• 6. Y. Huang, J. W. Hutchinson and V. Tvergaard, „Cavitation instabilities in elastic-plastic solids’,,” in J. Me& Phys. Solids, 39 , 1991.
• 7. V. Tvergaard, „Mecanical Modelling of Brittle Fracture”, Meccanica 26: 11-16, Kluwer Academic Publishers. Printed in the Netherlands, 1991.
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• 9. W. T. Bao Y., „A Comparative Study on Various Ductile Crack Formation Criteria,” in Transactions of the ASME, Vol. 126,, 2004.
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• 11. J. Hollomon, „Tensile Deformation,” Trans. AIME, p. 268, 1945.
• 12. A. NEIMITZ, J. GAŁKIEWICZ and I. DZIOBA, „KALIBRACJA ZWIĄZKÓW KONSTYTUTYWNYCH PRZY DUŻYCH ODKSZTAŁCENIACH PLASTYCZNYCH I DUŻYCH WSPÓŁCZYNNIKACH TRÓJOSIOWOŚCI,” in Zestawienie pełnych tekstów referatów XVI KRAJOWEJ KONFERENCJI MECHANIKI PĘKANIA, Pułtusk, 2017.
• 13. British Standard, BS 7448-1:1991 – Fracture mechanics toughness tests. Method for determination of KIc, critical CTOD and critical J values of metallic materials, Londyn: BSI, 1991.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).