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Träfflista för sökning "WFRF:(Dahlberg Carl F. O. 1980 ) srt2:(2021)"

Sökning: WFRF:(Dahlberg Carl F. O. 1980 ) > (2021)

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1.
  • Boåsen, Magnus, et al. (författare)
  • A weakest link model for multiple mechanism brittle fracture — Model development and application
  • 2021
  • Ingår i: Journal of the mechanics and physics of solids. - : Elsevier BV. - 0022-5096 .- 1873-4782. ; 147
  • Tidskriftsartikel (refereegranskat)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.
  • Dahlberg, Carl F. O., 1980-, et al. (författare)
  • Correlation of Global Quantities at Material Characterization of Pressure-Sensitive Materials Using Sharp Indentation Testing
  • 2021
  • Ingår i: LUBRICANTS. - : MDPI AG. - 2075-4442. ; 9:3
  • Tidskriftsartikel (refereegranskat)abstract
    • Correlation of sharp indentation problems is examined theoretically and numerically. The analysis focuses on elastic-plastic pressure-sensitive materials and especially the case when the local plastic zone is so large that elastic effects on the mean contact pressure will be small or negligible as is the case for engineering metals and alloys. The results from the theoretical analysis indicate that the effect from pressure-sensitivity and plastic strain-hardening are separable at correlation of hardness values. This is confirmed using finite element methods and closed-form formulas are presented representing a pressure-sensitive counterpart to the Tabor formula at von Mises plasticity. The situation for the relative contact area is more complicated as also discussed.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Faleskog, Jonas (2)
Dahlberg, Carl F. O. ... (2)
Larsson, Per-Lennart ... (1)
Efsing, Pål, 1965- (1)
Boåsen, Magnus (1)
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Kungliga Tekniska Högskolan (2)
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Engelska (2)
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2021 (2)Ta bort avgränsningen

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