Subsized Specimens for Fracture Resistance Characterisation Including Transferability Issues

0481204 - ÚFM 2018 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Dlouhý, Ivo - Stratil, Luděk - Šiška, Filip
Subsized Specimens for Fracture Resistance Characterisation Including Transferability Issues.
Analysis of Damage Features and Failures for Structural Materials and Parts. Zürich: Trans Tech Publications Ltd, 2017 - (Strnadel, B.), s. 110-115. Key Engineering Materials, 741. ISBN 978-3-0357-1127-1. ISSN 1013-9826.
[2016 - International Workshop on New Methods of Damage and Failure Analysis of Structural Parts /7./. Yokohama (JP), 01.11.2016-04.11.2016]
Grant CEP: GA ČR GJ15-21292Y
Institucionální podpora: RVO:68081723
Klíčová slova: Fracture toughness * Crack resistance curve * Transferability * Crack tip constraint * Subsized specimen
Obor OECD: Audio engineering, reliability analysis

The contribution is focused on characterization of methods enabling to apply small/subsized specimens for fracture resistance characterization. The applied methods are divided into transition region and upper shelf region. The approaches used in the upper shelf region represent at the same time methods applicable for ductile materials without transition. Relating to subsized samples two basic approaches are applicable: (i) miniaturized samples based on common standard ones and (ii) specific specimens/methods, e.g. small punch test etc. The results described in the paper belong to the first group. For interpretation of data generated under low constraint conditions toughness scaling models and master curve approached are commented. In ductile region, either the sample used generate valid toughness characteristics, or, if not, there is no way how to correct measured data except damage quantification through micromechanical models.
Trvalý link: http://hdl.handle.net/11104/0276830