Number of the records: 1
The prediction of size effect on J R curve for Eurofer97 steel by simplified mechanical model
- 1.
SYSNO ASEP 0450456 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title The prediction of size effect on J R curve for Eurofer97 steel 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 Source Title ASME 2015 Pressure Vessels and Piping Conference. - Boston : ASME, 2015 - ISBN 978-0-7918-5692-5 Pages s. 1-9 Number of pages 9 s. Publication form Print - P Action PVP 2015 Pressure Vessels & Piping Conference Event date 19.07.2015-23.07.2015 VEvent location Boston Country US - United States Event type WRD Language eng - English Country US - United States Keywords Schindler’s model ; Eurofer97 ; J-R curve ; size effect Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects EE2.3.20.0197 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GJ15-21292Y GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 UT WOS 000380290800065 EID SCOPUS 84961363052 DOI 10.1115/PVP2015-45703 Annotation The possibilities to derive fracture toughness from small specimens are naturally limited due to constraint requirements which are especially restrictive in toughness testing. The loss of constraint at the crack tip is more likely to occur as specimen size decreases. Application of miniature specimens in fracture toughness testing thus requires a suitable methodology or correction procedure to deal with phenomenon of the constraint loss. Schindler et al. have proposed a simplified mechanical model that can be used to scale up the key test characteristics from miniature specimen to the larger one. The model is applied to the miniature bending specimens to describe size effect on J R curve of the Eurofer97 steel. The examined steel exhibits quite high toughness values at upper shelf region of fracture toughness. As a result, experimentally determined J R curves of three different sizes of pre cracked bending specimens showed high values of J integral, which were significantly different each other. Using semi empirical definition of the exponent of the power law function of J R curve the performance of the Schindler’s model was quite successful. It was shown that the model is able to handle with size effect of tested pre cracked three point bend specimens. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2016
Number of the records: 1