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Effect of specimen geometry on fatigue crack propagation in threshold region

SYSNO ASEP	0332094
Document Type	C - Proceedings Paper (int. conf.)
R&D Document Type	O - Ostatní
Title	Effect of specimen geometry on fatigue crack propagation in threshold region
Title	Vliv geometrie zkušebního vzorku na šíření trhliny v oblasti prahových hodnot
Author(s)	Hutař, Pavel (UFM-A)_{RID, ORCID} Seitl, Stanislav (UFM-A)_{RID, ORCID} Kruml, Tomáš (UFM-A)_{RID, ORCID}
Number of authors	3
Source Title	Proceedings of 12th International Conference on Fracture. - Ottawa : NRCan - CANMET, 2009 - ISBN N
Pages	s. 1-9
Number of pages	9 s.
Publication form	CD-ROM - CD-ROM
Action	International Conference on Fracture /12./
Event date	12.07.2009-17.07.2009
VEvent location	Ottawa
Country	CA - Canada
Event type	WRD
Language	eng - English
Country	CA - Canada
Keywords	constraint ; fatigue crack growth rate ; crack closure
Subject RIV	JL - Materials Fatigue, Friction Mechanics
R&D Projects	GA101/08/1623 GA ČR - Czech Science Foundation (CSF)
	GA101/09/0867 GA ČR - Czech Science Foundation (CSF)
	GA106/09/1954 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z20410507 - UFM-A (2005-2011)
Annotation	The effect of constraint on the propagation of the fatigue crack was studied both theoretically and experimentally. Due to the strong difference in fatigue crack propagation rates in the threshold region obtained for C(T) and M(T) specimens for two different low carbon steels, it is not appropriate to use a fitting of all experimental data by the same material curve. The level of constraint induced by the different geometry of the specimen has to be considered. Fatigue crack growth close to the threshold is usually influenced by crack closure effects. For a conservative estimation of the residual fatigue life time of the structures it is better to use specimens with low level of the constraint.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2010

Number of the records: 1