Detail publikačního výsledku

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

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

Originální název

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

Anglický název

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

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

Effective threshold Mode II Crack deflection Ti6Al4V Zirconium

Klíčová slova v angličtině

Effective threshold Mode II Crack deflection Ti6Al4V Zirconium

Autoři

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

Rok RIV

2018

Vydáno

01.04.2017

ISSN

0013-7944

Periodikum

ENGINEERING FRACTURE MECHANICS

Svazek

174

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

117

Strany do

126

Strany počet

10

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",
  journal="ENGINEERING FRACTURE MECHANICS",
  year="2017",
  volume="174",
  number="1",
  pages="117--126",
  doi="10.1016/j.engfracmech.2016.11.024",
  issn="0013-7944"
}