Publication detail

Prediction of effective mode II fatigue crack growth threshold for metallic materials

VOJTEK, T. PIPPAN, R. HOHENWARTER, A. POKLUDA, J.

Original Title

Prediction of effective mode II fatigue crack growth threshold for metallic materials

English Title

Prediction of effective mode II fatigue crack growth threshold for metallic materials

Type

journal article in Web of Science

Language

en

Original Abstract

The fatigue crack growth threshold consists of the intrinsic component (effective threshold) and the extrinsic component (crack closure). Theoretical formulae for prediction of the mode II effective threshold in metallic materials are presented. The model is based on physical interpretation of experimental findings. For a given material the dominant local crack growth mode at the kinked crack front of a remote mode II loaded crack is identified and the local stress intensity factor is expressed, which represents a new concept for estimation of the mode II effective threshold. The local crack growth mode depends on microstructure and crystallographic structure of the material. Moreover, new experimental data for mode II effective thresholds of the Ti6Al4V alloy (DKIIeff,th = 1.8 MPa m1/2) and pure zirconium (DKIIeff,th = 1.3 MPa m1/2) are presented. These data extended the available database for metallic materials and confirmed a broad validity of the proposed theoretical relationships.

English abstract

The fatigue crack growth threshold consists of the intrinsic component (effective threshold) and the extrinsic component (crack closure). Theoretical formulae for prediction of the mode II effective threshold in metallic materials are presented. The model is based on physical interpretation of experimental findings. For a given material the dominant local crack growth mode at the kinked crack front of a remote mode II loaded crack is identified and the local stress intensity factor is expressed, which represents a new concept for estimation of the mode II effective threshold. The local crack growth mode depends on microstructure and crystallographic structure of the material. Moreover, new experimental data for mode II effective thresholds of the Ti6Al4V alloy (DKIIeff,th = 1.8 MPa m1/2) and pure zirconium (DKIIeff,th = 1.3 MPa m1/2) are presented. These data extended the available database for metallic materials and confirmed a broad validity of the proposed theoretical relationships.

Keywords

Effective threshold Mode II Crack deflection Ti6Al4V Zirconium

Released

01.04.2017

ISBN

0013-7944

Periodical

Engineering Fracture Mechanics

Year of study

174

Number

1

State

GB

Pages from

117

Pages to

126

Pages count

10

Documents

BibTex


@article{BUT141912,
  author="Tomáš {Vojtek} and Reinhard {Pippan} and Anton {Hohenwarter} and Jaroslav {Pokluda}",
  title="Prediction of effective mode II fatigue crack growth threshold for metallic materials",
  annote="The fatigue crack growth threshold consists of the intrinsic component (effective threshold)
and the extrinsic component (crack closure). Theoretical formulae for prediction of
the mode II effective threshold in metallic materials are presented. The model is based
on physical interpretation of experimental findings. For a given material the dominant local
crack growth mode at the kinked crack front of a remote mode II loaded crack is identified
and the local stress intensity factor is expressed, which represents a new concept for estimation
of the mode II effective threshold. The local crack growth mode depends on
microstructure and crystallographic structure of the material. Moreover, new experimental
data for mode II effective thresholds of the Ti6Al4V alloy (DKIIeff,th = 1.8 MPa m1/2) and pure
zirconium (DKIIeff,th = 1.3 MPa m1/2) are presented. These data extended the available database
for metallic materials and confirmed a broad validity of the proposed theoretical
relationships.",
  chapter="141912",
  doi="10.1016/j.engfracmech.2016.11.024",
  howpublished="print",
  number="1",
  volume="174",
  year="2017",
  month="april",
  pages="117--126",
  type="journal article in Web of Science"
}