Publication detail

Crack Growth in Ceramic Laminates with Strong Interfaces and Large Compressive Residual Stresses

KOTOUL, M. ŠEVEČEK, O. VYSLOUŽIL, T.

Czech title

Výpočtová analýza růstu trhliny v keramických laminátech s vysokou pevností rozhraní a velkými tlakovými residuálními napětími

English title

Crack Growth in Ceramic Laminates with Strong Interfaces and Large Compressive Residual Stresses

Type

journal article in Web of Science

Language

en

Original abstract

Residual compressive stresses developed in layered ceramics may improve the crack resistance of the material during crack growth by reducing the crack driving force at the crack tip. i.e. R-curve behaviour occurs. Elastic contrast of layers often plays an important role by inducing an additional crack driving force term which can promote (anti-shield) or retard (shield) the crack propagation. Since the toughening effect of the residual stress state is often predicted by means of the weight function method, it is matter of interest to find limits for the application of weight function concept in elastically inhomogeneous laminates. Another objective of the paper is to investigate in detail the very process of crack transition across thermo-elastically mismatched layer interfaces. Due to the discontinuity in the elastic properties, finite crack extensions are to be considered instead of infinitesimal one. The concept of Finite Fracture Mechanics (FFM) is applied to tackle this problem.

Czech abstract

Residual compressive stresses developed in layered ceramics may improve the crack resistance of the material during crack growth by reducing the crack driving force at the crack tip. i.e. R-curve behaviour occurs. Elastic contrast of layers often plays an important role by inducing an additional crack driving force term which can promote (anti-shield) or retard (shield) the crack propagation. Since the toughening effect of the residual stress state is often predicted by means of the weight function method, it is matter of interest to find limits for the application of weight function concept in elastically inhomogeneous laminates. Another objective of the paper is to investigate in detail the very process of crack transition across thermo-elastically mismatched layer interfaces. Due to the discontinuity in the elastic properties, finite crack extensions are to be considered instead of infinitesimal one. The concept of Finite Fracture Mechanics (FFM) is applied to tackle this problem.

English abstract

Residual compressive stresses developed in layered ceramics may improve the crack resistance of the material during crack growth by reducing the crack driving force at the crack tip. i.e. R-curve behaviour occurs. Elastic contrast of layers often plays an important role by inducing an additional crack driving force term which can promote (anti-shield) or retard (shield) the crack propagation. Since the toughening effect of the residual stress state is often predicted by means of the weight function method, it is matter of interest to find limits for the application of weight function concept in elastically inhomogeneous laminates. Another objective of the paper is to investigate in detail the very process of crack transition across thermo-elastically mismatched layer interfaces. Due to the discontinuity in the elastic properties, finite crack extensions are to be considered instead of infinitesimal one. The concept of Finite Fracture Mechanics (FFM) is applied to tackle this problem.

Keywords in Czech

Ceramic laminates; FEM; R-curve; residual stresses; bimaterial interface; finite fracture mechanics.

Keywords in English

Ceramic laminates; FEM; R-curve; residual stresses; bimaterial interface; finite fracture mechanics.

RIV year

2012

Released

15.10.2012

ISSN

0167-8442

Volume

2012 (61)

Number

1

Pages from–to

40–50

Pages count

11

BIBTEX


@article{BUT95677,
  author="Michal {Kotoul} and Oldřich {Ševeček} and Tomáš {Vysloužil},
  title="Crack Growth in Ceramic Laminates with Strong Interfaces and Large Compressive Residual Stresses",
  year="2012",
  volume="2012 (61)",
  number="1",
  month="October",
  pages="40--50",
  issn="0167-8442"
}