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A three-point bend specimen with partly tapered cross-section sides
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.
2010 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 77, no 10, p. 1537-1551Article in journal (Refereed) Published
Abstract [en]

The stress intensity factor and the J-integral have been derived analytically and numerically for a modified three-point bend specimen with partly tapered sides, for various crack lengths, taper and specimen cross-section proportions, in order to allow full-thickness testing of tapered samples, common in older steel structures, to obtain a fair effective fracture toughness value for a through thickness crack in inhomogeneous materials. The stress intensity factor is obtained with the approximate analytical method of Kienzler and Herrmann, based on the concept of material forces. The J-integral is calculated numerically with a 3D finite element model for a linear elastic material and an elastic ideal-plastic material. A simple single specimen fracture toughness evaluation procedure is proposed. It is found that the effect of taper in the range encountered in practice is small, of the order of a few percent.

Place, publisher, year, edition, pages
2010. Vol. 77, no 10, p. 1537-1551
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-4837DOI: 10.1016/j.engfracmech.2010.04.017ISI: 000280172500004Scopus ID: 2-s2.0-77953616909Local ID: 2d47ebe0-53ad-11df-a0f4-000ea68e967bOAI: oai:DiVA.org:ltu-4837DiVA, id: diva2:977711
Note

Validerad; 2010; 20100429 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Eriksson, Kjell

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