Detail publikačního výsledku

Failure behavior of coated materials

KNÉSL, Z.; NÁHLÍK, L.; BAREŠ, P.

Originální název

Failure behavior of coated materials

Anglický název

Failure behavior of coated materials

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

Results concerning the influence of a through coating crack on the substrate failure are reported. The problem is studied under the assumptions corresponding to small scale yielding conditions and calculations are performed by the finite element method. An approximate approach based on calculations of crack mouth opening displacement for thin protective layers is suggested. It is concluded that in the case of a stiffer coating on a more compliant substrate, the through coating cracks represent dangerous stress concentrators, and as a consequence of elastic mismatch of both materials, the critical applied stress for substrate failure decreases. Traditional approaches may have underestimated this effect and estimations of the service life of coated structures neglecting this phenomenon could lead to non-conservative values, with unexpected failures.

Anglický abstrakt

Results concerning the influence of a through coating crack on the substrate failure are reported. The problem is studied under the assumptions corresponding to small scale yielding conditions and calculations are performed by the finite element method. An approximate approach based on calculations of crack mouth opening displacement for thin protective layers is suggested. It is concluded that in the case of a stiffer coating on a more compliant substrate, the through coating cracks represent dangerous stress concentrators, and as a consequence of elastic mismatch of both materials, the critical applied stress for substrate failure decreases. Traditional approaches may have underestimated this effect and estimations of the service life of coated structures neglecting this phenomenon could lead to non-conservative values, with unexpected failures.

Klíčová slova

crack mouth opening displacement, crack propagation, bimaterial interface

Klíčová slova v angličtině

crack mouth opening displacement, crack propagation, bimaterial interface

Autoři

KNÉSL, Z.; NÁHLÍK, L.; BAREŠ, P.

Vydáno

23.08.2005

Nakladatel

University of Zilina

Místo

Žilina

ISBN

80-969165-4-8

Kniha

10 th International Conference on Numerical Methods in Continuum Mechanics

Strany od

47

Strany do

48

Strany počet

2

BibTex

@inproceedings{BUT21717,
  author="Zdeněk {Knésl} and Luboš {Náhlík} and Pavel {Bareš}",
  title="Failure behavior of coated materials",
  booktitle="10 th International Conference on Numerical Methods in Continuum Mechanics",
  year="2005",
  pages="47--48",
  publisher="University of Zilina",
  address="Žilina",
  isbn="80-969165-4-8"
}