Title: Introduction of a New Notched Specimen Geometry to Determine Fracture Properties by Small Punch Testing
Authors: TURBA KRYSTOFGULCIMEN BetulLI YingzhiBLAGOEVA DarinaHAEHNER PeterHURST ROGER
Citation: ENGINEERING FRACTURE MECHANICS vol. 78 no. 16 p. 2826-2833
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2011
JRC N°: JRC66755
ISSN: 0013-7944
URI: http://www.elsevier.com/locate/engfracmech
http://publications.jrc.ec.europa.eu/repository/handle/JRC66755
DOI: 10.1016/j.engfracmech.2011.08.014
Type: Articles in Journals
Abstract: The small punch (SP) testing technique can be used to assess fracture properties from a very small volume of material. However, the correlation of fracture parameters obtained from SP testing with those produced using standard methods is non-trivial, not only due to the size effect, but also due to the absence of a notch in most existing types of SP specimens. In the present study, a novel SP specimen design is proposed, with a sharp circular notch, leading to the development of a near plane strain condition during the SP test. The new geometry is examined through SP testing of P91 steel, as well as finite element analysis. Optical and scanning electron microscopy is used to study the crack propagation from the notch tip in both ductile and brittle fracture modes.
JRC Institute:Institute for Transuranium Elements

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