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International Journal of Fracture

, Volume 134, Issue 2, pp 151–159 | Cite as

Shielding Stresses for Soft PZT

  • T. Fett
  • A. B. Kounga NjiwaEmail author
  • J. Rödel
Article

Abstract

Crack opening displacements (COD) were obtained on fully developed cracks in compact tension specimens manufactured from a commercial, soft lead zirconate titanate (PZT). The data were evaluated using the weight function method to provide crack closures stresses as a function of distance to the crack tip. As ferroelastic toughening in PZT shows time-dependent effects, data were taken at different stages of unloading. The peak closure stress was determined as 20 MPa.

Keywords

Closure stresses crack opening displacements PZT weight functions 

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Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Forschungszentrum KarlsruheInstitut für Materialforschung IIKarlsruheGermany
  2. 2.Institute of Materials ScienceDarmstadt University of TechnologyDarmstadtGermany

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