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A probabilistic model for cleavage fracture with a length scale - parameter estimation and predictions of stationary crack experiments
KTH, Superseded Departments, Solid Mechanics.ORCID iD: 0000-0003-2470-7679
KTH, Superseded Departments, Solid Mechanics.
KTH, Superseded Departments, Solid Mechanics.
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 degreesC. 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.
Keyword [en]
cleavage fracture, failure probability, length scale, threshold toughness, fracture experiments, Master curve
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-12788DOI: 10.1016/S0013-7944(03)00066-3ISI: 000185968600004Scopus ID: 2-s2.0-0141993233OAI: oai:DiVA.org:kth-12788DiVA: diva2:318823
Note
QC 20100511 QC 20111031Available from: 2010-05-11 Created: 2010-05-11 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Probabilistic modelling of cleavage fracture
Open this publication in new window or tab >>Probabilistic modelling of cleavage fracture
2001 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2001. 6 p.
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-1362 (URN)
Presentation
(English)
Note
QC 20100511Available from: 2002-01-11 Created: 2002-01-11 Last updated: 2010-05-11Bibliographically approved
2. 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 scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2003. 22 p.
Series
Trita-HFL, ISSN 1104-6813 ; 0344
Keyword
cleavage fracture, probabilistic, micromechanical
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-3605 (URN)
Public defence
2003-10-03, 00:00 (English)
Note
QC 20100511Available from: 2003-10-01 Created: 2003-10-01 Last updated: 2010-05-11Bibliographically approved

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