Publication result detail

3D Atomistic Simulation of Fatigue Behaviour of Cracked Single Crystal of bcc Iron Loaded in Mode III

UHNÁKOVÁ, A.; POKLUDA, J.; MACHOVÁ, A.; HORA, P.

Original Title

3D Atomistic Simulation of Fatigue Behaviour of Cracked Single Crystal of bcc Iron Loaded in Mode III

English Title

3D Atomistic Simulation of Fatigue Behaviour of Cracked Single Crystal of bcc Iron Loaded in Mode III

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

We present new results of 3D molecular dynamic (MD) simulations of a mechanical behaviour of an edge crack <110>[110] (crack plane/crack front) in a single crystal of bcc iron cyclically loaded in mode III at room temperature. Our previous 3D molecular dynamic simulations showed that this crack under monotonic uniaxial tension loading in mode I emitted blunting dislocations in the inclined <111>(112) slip systems and it was stable up to very high loads, in qualitative agreement with experiments and continuum predictions. Our question is how the cyclic loading in mode III changes the crack behaviour and its stability. The paper also brings information on how the distribution of external forces in mode III influences the fatigue crack behaviour and how the defects generated by the crack can produce experimentally observed advances of the crack front in local modes I, II, I + II and II + III.

English abstract

We present new results of 3D molecular dynamic (MD) simulations of a mechanical behaviour of an edge crack <110>[110] (crack plane/crack front) in a single crystal of bcc iron cyclically loaded in mode III at room temperature. Our previous 3D molecular dynamic simulations showed that this crack under monotonic uniaxial tension loading in mode I emitted blunting dislocations in the inclined <111>(112) slip systems and it was stable up to very high loads, in qualitative agreement with experiments and continuum predictions. Our question is how the cyclic loading in mode III changes the crack behaviour and its stability. The paper also brings information on how the distribution of external forces in mode III influences the fatigue crack behaviour and how the defects generated by the crack can produce experimentally observed advances of the crack front in local modes I, II, I + II and II + III.

Keywords

Fatigue; Mode III; bcc iron; Molecular dynamics simulations

Key words in English

Fatigue; Mode III; bcc iron; Molecular dynamics simulations

Authors

UHNÁKOVÁ, A.; POKLUDA, J.; MACHOVÁ, A.; HORA, P.

RIV year

2012

Released

01.11.2011

ISBN

0142-1123

Periodical

International Journal of Fatigue

Volume

33

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1564

Pages to

1573

Pages count

10

BibTex

@article{BUT76124,
  author="Alena {Uhnáková} and Jaroslav {Pokluda} and Anna {Machová} and Petr {Hora}",
  title="3D Atomistic Simulation of Fatigue Behaviour of Cracked Single Crystal of bcc Iron Loaded in Mode III",
  journal="International Journal of Fatigue",
  year="2011",
  volume="33",
  number="1",
  pages="1564--1573",
  issn="0142-1123"
}