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A probabilistic model for cleavage fracture with a length scale: parameter estimation and predictions of stationary crack experiments
Royal Institute of Technology.
Royal Institute of Technology.
Royal Institute of Technology.
2004 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 71, no 1, 57-79 p.Article in journal (Refereed) Published
Abstract [en]

This study presents a large experimental investigation in the transition temperature region on a modified A508 steel. Tests were carried out on single-edge-notch-bend specimens with three different crack depth over specimen width ratios to capture the strong constraint effect on fracture toughness. Three test temperatures were considered, covering a range of 85 °C. All specimens failed by cleavage fracture prior to ductile tearing. A recently proposed probabilistic model for the cumulative failure by cleavage was applied to the comprehensive sets of experimental data. This modified weakest link model incorporates a length scale, which together with a threshold stress reduce the scatter in predicted toughness distributions as well as introduces a fracture toughness threshold value. Model parameters were estimated by a robust procedure, which is crucial in applications of probabilistic models to real structures. The conformity between predicted and experimental toughness distributions, respectively, were notable at all the test temperatures.

Place, publisher, year, edition, pages
2004. Vol. 71, no 1, 57-79 p.
National Category
Metallurgy and Metallic Materials Applied Mechanics
Identifiers
URN: urn:nbn:se:lnu:diva-58229DOI: 10.1016/S0013-7944(03)00066-3OAI: oai:DiVA.org:lnu-58229DiVA: diva2:1048643
Available from: 2016-11-21 Created: 2016-11-21 Last updated: 2016-12-12Bibliographically approved
In thesis
1. Probabilistic and micromechanical modelling of cleavage fracture
Open this publication in new window or tab >>Probabilistic and micromechanical modelling of cleavage fracture
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2003
Series
Trita-HFL, ISSN 1104-6813 ; 0344
Keyword
cleavage fracture, probabilistic, micromechanical
National Category
Mechanical Engineering
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
urn:nbn:se:lnu:diva-58925 (URN)
Available from: 2016-12-12 Created: 2016-12-09 Last updated: 2016-12-12Bibliographically approved

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Kroon, Martin
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf