Publication result detail

Mikromechanismy šíření únavových trhlin ve smykových módech v austenitické oceli

HOLÁŇ, L.; POKLUDA, J.; PIPPAN, R.

Original Title

Mikromechanismy šíření únavových trhlin ve smykových módech v austenitické oceli

English Title

Mikromechanisms of fatigue crack propagation under shear modes in austenitic steel

Type

Paper in proceedings (conference paper)

Original Abstract

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.

English abstract

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.

Keywords

mikromechanismy šíření, smykové módy, prahové hodnoty šíření

Key words in English

micromechanisms of crack propagation, shear modes, threshold crack growth rate

Authors

HOLÁŇ, L.; POKLUDA, J.; PIPPAN, R.

RIV year

2013

Released

02.12.2010

ISBN

978-80-87434-02-4

Book

Víceúrovňový design pokrokových materiálů 10

Pages from

107

Pages to

114

Pages count

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",
  pages="107--114",
  isbn="978-80-87434-02-4"
}