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A probabilistic model for cleavage fracture with a length scale - Parameter estimation and predictions of growing crack experiments
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Biomechanics.
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).ORCID iD: 0000-0003-2470-7679
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
2008 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 75, no 8, 2398-2417 p.Article in journal (Refereed) Published
Abstract [en]

A probabilistic model for the cumulative probability of failure by cleavage fracture was applied to experimental results where cleavage fracture was preceded by ductile crack growth. The model, introduced by Kroon and Faleskog [Kroon M, Faleskog J. A probabilistic model for cleavage fracture with a length scale - influence of material parameters and constraint. Int J Fract 2002; 118:99-118], includes a non-local stress with an associated material related length scale, and it also includes a strain measure to account for the number of nucleated cleavage initiation sites. The experiments were performed on single edge cracked bend test specimens with three different crack lengths at the temperature 85 degrees C, which is in the upper transition region for the steel in question. The ductile rupture process is modelled using tile cell model for nonlinear fracture mechanics. The original cleavage fracture model had to be modified in order to account for the substantial number of cleavage initiators being consumed by the ductile process. With this modification, the model was able to accurately capture the experimental failure probability distribution.

Place, publisher, year, edition, pages
2008. Vol. 75, no 8, 2398-2417 p.
Keyword [en]
cleavage fracture, ductile cell model, failure probability, length scale, threshold toughness, fracture experiments, weakest link
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-12787DOI: 10.1016/j.engfracmech.2007.08.009ISI: 000254354000030Scopus ID: 2-s2.0-39149089655OAI: oai:DiVA.org:kth-12787DiVA: diva2:318824
Note
QC 20100511Available 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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