Detail publikace
Mikromechanismy šíření únavových trhlin ve smykových módech v austenitické oceli
HOLÁŇ, L. POKLUDA, J. PIPPAN, R.
Český název
Mikromechanismy šíření únavových trhlin ve smykových módech v austenitické oceli
Anglický název
Mikromechanisms of fatigue crack propagation under shear modes in austenitic steel
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
cs
Originální abstrakt
Two experimental arrangements allowing loading of two different cylindrical specimens with circumferential notches were used to measure threshold values of the stress intensity factor range and the near-threshold crack growth rates under shear loading modes II and III. Fatigue cracks under shear mode II were kinked while those under shear mode III were twisted. Therefore, all cracks propagated rather under a pure local mode I. Micromechanisms of crack growths under shear modes II and III were evaluated by means of stereophotogrammetry and optical chromatography. The values of intrinsic thresholds under modes II and III were found to be KII,ith = 2,9 MPa.m1/2 and KIII,ith = 4,0 MPa.m1/2, respectively.
Český abstrakt
Two experimental arrangements allowing loading of two different cylindrical specimens with circumferential notches were used to measure threshold values of the stress intensity factor range and the near-threshold crack growth rates under shear loading modes II and III. Fatigue cracks under shear mode II were kinked while those under shear mode III were twisted. Therefore, all cracks propagated rather under a pure local mode I. Micromechanisms of crack growths under shear modes II and III were evaluated by means of stereophotogrammetry and optical chromatography. The values of intrinsic thresholds under modes II and III were found to be KII,ith = 2,9 MPa.m1/2 and KIII,ith = 4,0 MPa.m1/2, respectively.
Anglický abstrakt
Two experimental arrangements allowing loading of two different cylindrical specimens with circumferential notches were used to measure threshold values of the stress intensity factor range and the near-threshold crack growth rates under shear loading modes II and III. Fatigue cracks under shear mode II were kinked while those under shear mode III were twisted. Therefore, all cracks propagated rather under a pure local mode I. Micromechanisms of crack growths under shear modes II and III were evaluated by means of stereophotogrammetry and optical chromatography. The values of intrinsic thresholds under modes II and III were found to be KII,ith = 2,9 MPa.m1/2 and KIII,ith = 4,0 MPa.m1/2, respectively.
Klíčová slova česky
mikromechanismy šíření, smykové módy, prahové hodnoty šíření
Klíčová slova anglicky
micromechanisms of crack propagation, shear modes, threshold crack growth rate
Rok RIV
2010
Vydáno
02.12.2010
ISBN
978-80-87434-02-4
Kniha
Víceúrovňový design pokrokových materiálů 10
Strany od–do
107–114
Počet stran
8
BIBTEX
@inproceedings{BUT35346,
author="Libor {Holáň} and Jaroslav {Pokluda} and Reinhard {Pippan},
title="Mikromechanismy šíření únavových trhlin ve smykových módech v austenitické oceli",
booktitle="Víceúrovňový design pokrokových materiálů 10",
year="2010",
month="December",
pages="107--114",
isbn="978-80-87434-02-4"
}