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The formation and failure at -30 deg C of cracked broad flange beams of ordinary structural steel in bending
1993 (English)In: Shallow crack fracture mechanics, toughness tests and applications: conference : Cambridge, UK, 23-24 September 1992 / [ed] Michael G. Dawes, Cambridge: Bentham Press , 1993, p. 10/1-10/9Conference paper, Published paper (Refereed)
Abstract [en]

The deformation and failure in bending of precracked broad flange beams of type HEB 400 and similar was studied. Six m long beam elemments were slowly loaded to fracture or plastic deformation at the testing temperature -30 deg C. The J contour integral for the full scale beam element was calculated with the finite element method for two typical crack lengths. J as a function length was approximated with the R6-method using analytical estimates of the fully plastic bending moment for thin-walled beam cross-sections. Critical values of J and CTOD were obtained with standard compact and SENB specimens machined from the beam flanges. Although scatter is considerable the fracture toughness ranges of the laboratory specimens and of the full scale tests are very much in coincidence. By means of a residual strength diagram the borderline between long and short cracks is illustrated. Here long cracks are those which caused fracture and short cracks just plastic deformation but no crack growth.

Place, publisher, year, edition, pages
Cambridge: Bentham Press , 1993. p. 10/1-10/9
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-30165Local ID: 3e6aefb0-099b-11de-9f31-000ea68e967bISBN: 1-85573-122-3 (print)OAI: oai:DiVA.org:ltu-30165DiVA, id: diva2:1003392
Conference
SInternational Conference Shallow Crack Fracture Mechanics, Toughness Tests and Applications : 23/09/1992 - 24/09/1992
Note
Godkänd; 1993; 20090305 (andbra)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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