Journal of Materials Science

, Volume 19, Issue 2, pp 672–682 | Cite as

Fracture of ceramics with surface flaws introduced by Knoop indentation



The crack opening behaviour of surface flaws in ceramic materials, produced by Knoop indentation tests, was investigated. The damaged region below the indenter tip was replaced by a wedge. The influence of this wedge is reduced, if tensile stresses are acting at the damaged surface. For alumina the wedging force in moment of fracture was found approximately 50% of its value without additional bending.


Polymer Alumina Tensile Stress Ceramic Material Surface Flaw 
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Copyright information

© Chapman and Hall Ltd. 1984

Authors and Affiliations

  • T. Fett
    • 1
  1. 1.Kernforschungszentrum KarlsruheArbeitsgruppe Zuverlässigkeit und Schadenskunde am Institut für ReaktorbauelementeWest Germany

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