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Subsized Specimens for Fracture Resistance Characterization Including Transferability Issues

SYSNO ASEP	0468064
Document Type	O - Others
R&D Document Type	Others
Title	Subsized Specimens for Fracture Resistance Characterization Including Transferability Issues
Author(s)	Dlouhý, Ivo (UFM-A)_{RID, ORCID} Stratil, Luděk (UFM-A)_ORCID Šiška, Filip (UFM-A)_{RID, ORCID}
Number of authors	3
Year of issue	2016
Language	eng - English
Country	JP - Japan
Keywords	fracture toughness ; crack resistance curve ; transferability ; crack tip constraint ; subsized specimen
Subject RIV	JL - Materials Fatigue, Friction Mechanics
R&D Projects	GJ15-21292Y GA ČR - Czech Science Foundation (CSF)
Institutional support	UFM-A - RVO:68081723
Annotation	The fracture mechnics parameters characterise the stress singularity in front of the crack tip. At the existence of a small plastic zone at the crack tip (Small Scale Yielding (SSY)) conditions the fracture mechnics parameter characterises the crak tip conditions. The single parameter (e.g. K, J or CTOD) can be applied as a geometry-independent fracture criterion. Any surpassing of the SSY conditions causing decrease of the level of the stressses in the vicinity of the crack tip. The single-parameter fracture mechanics then breaks down and fracture toughness depends on the size and geometry of the test specimen. Small Specimen Test Technique has been solved for two miniature specimen types. The test results are discusssed from the point of view of validity of fracture toughness characteristics. The quantification of the constraint at the crack tip using FEA, T-stress and Q-parameter is performed. Correcrion of fracture toughness values corresponding to the SSY conditions is given.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2017

Number of the records: 1