Publication result detail

Analysis of Multiple Cracks in Thin Coating on Orthotropic Substrate

KOTOUL, M.; PROFANT, T.; ŠEVEČEK, O.

Original Title

Analysis of Multiple Cracks in Thin Coating on Orthotropic Substrate

English Title

Analysis of Multiple Cracks in Thin Coating on Orthotropic Substrate

Type

Paper in proceedings (conference paper)

Original Abstract

The analysis addresses a typical failure development pattern consisting of a system of multiple surface cracks leading to and branching along or near the interface between the coating and the base material. The process is driven by thermal stresses. Due to the high temperature gradients during the fabrication process, usually a net of surface cracks develops, which gives the appearance of a granular structure of the surface. A periodic array of parallel surface cracks is assumed. A ''unit cell'' or single cracked segment attached to the substrate is analyzed instead by assuming the channel cracks are spaced more or less uniformly and perfectly aligned in parallel in the transverse direction of the coating. The problem is solved using both FEM combined with the reciprocal theorem and the technique of distributed dislocations. Existing semi-analytical solution for singularities in anisotropic trimaterials is applied.

English abstract

The analysis addresses a typical failure development pattern consisting of a system of multiple surface cracks leading to and branching along or near the interface between the coating and the base material. The process is driven by thermal stresses. Due to the high temperature gradients during the fabrication process, usually a net of surface cracks develops, which gives the appearance of a granular structure of the surface. A periodic array of parallel surface cracks is assumed. A ''unit cell'' or single cracked segment attached to the substrate is analyzed instead by assuming the channel cracks are spaced more or less uniformly and perfectly aligned in parallel in the transverse direction of the coating. The problem is solved using both FEM combined with the reciprocal theorem and the technique of distributed dislocations. Existing semi-analytical solution for singularities in anisotropic trimaterials is applied.

Keywords

Multiple cracks, coating, interface, thermal stresses, distribution of dislocations, reciprocal theorem

Key words in English

Multiple cracks, coating, interface, thermal stresses, distribution of dislocations, reciprocal theorem

Authors

KOTOUL, M.; PROFANT, T.; ŠEVEČEK, O.

RIV year

2010

Released

30.08.2008

Publisher

VUTIUM Brno

Location

Czech Republic

ISBN

9781617823190

Book

Multilevel Approach to Fracture of Materials, Components and Structures

Edition

1

Pages from

170

Pages to

177

Pages count

8

BibTex

@inproceedings{BUT26747,
  author="Michal {Kotoul} and Tomáš {Profant} and Oldřich {Ševeček}",
  title="Analysis of Multiple Cracks in Thin Coating on Orthotropic Substrate",
  booktitle="Multilevel Approach to Fracture of Materials, Components and Structures",
  year="2008",
  series="1",
  number="1",
  pages="170--177",
  publisher="VUTIUM Brno",
  address="Czech Republic",
  isbn="9781617823190"
}