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The size effect on J-R curve for construction steels and its prediction by simplified mechanical model
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SYSNO ASEP 0495908 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title The size effect on J-R curve for construction steels and its prediction by simplified mechanical model Author(s) Stratil, Luděk (UFM-A) ORCID
Šiška, Filip (UFM-A) RID, ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Dlouhý, Ivo (UFM-A) RID, ORCIDNumber of authors 4 Article number UNSP V06BT06A066 Source Title PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2018,, VOL 6B. - New York : ASME, 2019 / Qian H. ; Brongers M. ; Uddin M. - ISBN 978-0-7918-5168-5 Number of pages 6 s. Publication form Online - E Action ASME 2018 - Pressure Vessels and Piping Conference Event date 15.07.2018 - 20.07.2018 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country US - United States Keywords Fracture toughness ; J-R curve ; P91 ; Eurofer97 ; size effect ; Schindler's model Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Audio engineering, reliability analysis R&D Projects GA17-13573S GA ČR - Czech Science Foundation (CSF) EE2.3.20.0197 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFM-A - RVO:68081723 UT WOS 000460999000066 EID SCOPUS 85056855115 Annotation Evaluation of mechanical properties from a small amount of test material is essential in a process of development of new alloys and monitoring of degradation and damage of in-service components. Miniaturization of test specimen together with a specimen reconstitution technique enable direct method of evaluation of mechanical properties if only a limited amount of material is available. Modern types of construction steels and alloys possess improved metallurgical and mechanical properties and also demonstrate a high level of fracture toughness. In these cases, correlation and correction of size effect on fracture toughness between different specimen sizes are needed. Within this contribution the size effect of J-R curve for two sizes of three-point-bend specimens is solved. The J-R curves of three-point-bend specimens with cross-section 10×10 mm and 3×4 mm of P91 and Eurofer97 steel were determined at room temperature. The existence of size effect is proven as larger specimens demonstrate higher J-R curves than smaller specimens for both steels. Simplified mechanical model based on fracture energies initially proposed by Schindler et al. is applied to describe experimentally determined J-R curves and to predict the observed size effect between used specimen sizes. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2020
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