Detail publikace

Dislocation-based model of plasticity and roughness-induced crack closure

POKLUDA, J.

Anglický název

Dislocation-based model of plasticity and roughness-induced crack closure

Typ

Článek WoS

Jazyk

en

Originální abstrakt

The paper presents a discrete dislocation model of contact shielding effects in the case of small-scale yielding under plane-strain conditions. The model is physically transparent and, unlike continuum-based models for plane stress, it enables us to directly assess the magnitude of both plasticity and roughness-induced components of crack closure. Moreover, it reflects an influence of microstructure on the roughness-induced term. The closure components can be simply extracted from experimentally measured values of the remote DK using standard data on mechanical properties and microstructure. Thus, the effective threshold DKeff,th can be obtained as nearly independent of microstructure coarseness and applied cyclic ratio as shown for several important engineering materials

Klíčová slova anglicky

Crack-tip shielding, Discrete dislocations, Fatigue crack-growth, Effective threshold, Size ratio

Vydáno

2013-01-15

ISSN

0142-1123

Časopis

International Journal of Fatigue

Ročník

46

Číslo

1

Strany od–do

35–40

Počet stran

6

BIBTEX


@article{BUT99299,
  author="Jaroslav {Pokluda}",
  title="Dislocation-based model of plasticity and roughness-induced crack closure",
  journal="International Journal of Fatigue",
  year="2013",
  volume="46",
  number="1",
  pages="35--40",
  doi="10.1016/j.ijfatigue.2011.11.016",
  issn="0142-1123"
}