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Träfflista för sökning "WFRF:(Boåsen Magnus) srt2:(2021)"

Search: WFRF:(Boåsen Magnus) > (2021)

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  • Boåsen, Magnus, et al. (author)
  • A weakest link model for multiple mechanism brittle fracture — Model development and application
  • 2021
  • In: Journal of the mechanics and physics of solids. - : Elsevier BV. - 0022-5096 .- 1873-4782. ; 147
  • Journal article (peer-reviewed)abstract
    • A multiple mechanism weakest link model for intergranular and transgranular brittle fracture is developed on the basis of experimental observations of a thermally aged low alloy steel. The model development is carried out in tandem with micro mechanical analysis of grain boundary cracking using crystal plasticity modeling of polycrystalline aggregates with the purpose to inform the weakest link model. The fracture modeling presented in this paper is carried out by using a non-local porous plastic Gurson model where the void volume fraction evolution is regularized over two separate length scales. The ductile crack growth preceding the final brittle fracture is well predicted using this type of modeling. When applied to the brittle fracture tests, the weakest link model predicts the fracture toughness distribution remarkably well, both in terms of the constraint and the size effect. Included in the study is also the analysis of a reference material.
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2.
  • Halilovic, Armin, et al. (author)
  • An experimental-numerical screening method for assessing environmentally assisted degradation in high strength steels
  • 2021
  • In: Engineering Fracture Mechanics. - : Elsevier BV. - 0013-7944 .- 1873-7315. ; 245
  • Journal article (peer-reviewed)abstract
    • In this work, an experimental-numerical screening method for studying the elastic-plastic properties in high strength steel subjected to environmentally assisted degradation due to hydrogen is proposed. The experiments were performed on single-edge-notch bend specimens loaded with a monotonic constant displacement rate, and the specimens were electrochemically hydrogen pre-charged and/or in-situ. A systematic investigation was conducted of the influence of current density, pre-charging time and loading rate on the fracture mechanical properties. It was found that the loading rate had the greatest effect on the J-R curves, and that the environmental ductile-to-brittle transition region was obtained in a less than a day of experimental time. In this transition region it was found from the fractography that the dominating mode of failure changed from dimple to dominating intergranular fracture.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Faleskog, Jonas (2)
Efsing, Pål, 1965- (2)
Boåsen, Magnus (2)
Dahlberg, Carl F. O. ... (1)
Halilovic, Armin (1)
University
Royal Institute of Technology (2)
Language
English (2)
Research subject (UKÄ/SCB)
Engineering and Technology (2)
Year
2021 (2)Undo refine

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