Acta Mechanica Sinica

, Volume 19, Issue 2, pp 147–153 | Cite as

Toughening of ferroelectrics by the out-of-plane poling

  • Yang Wei
  • Fang Fei
Article

Abstract

Subjected to the prior out-of-plane poling, the ferroelectrics can be toughened considerably. The present paper describes the variation of the stress intensity factor (SIF) by 90° switching in ferroelectrics. The analysis is carried out for the combined mechanical and electrical loading, with simple relations obtained for the case of the purely electrical loading. The out-of-plane poling is found to raise the SIF for the crack initiation, but appreciably reduces the SIF for the crack growth in a steady state. More stable fracture resistance curves can be achieved by the out-of-plane poling. This prediction is supported quantitatively by the testing data of SENB specimens of PZT-5 samples, when the toughening effects of polings in three orthogonal directions are compared.

Key Words

ferroelectrics domain switching out-of-plane poling fracture toughness stress intensity factors 

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Copyright information

© Chinese Society of Theoretical and Applied Mechanics 2003

Authors and Affiliations

  • Yang Wei
    • 1
  • Fang Fei
    • 1
  1. 1.Department of Engineering MechanicsTsinghua UniversityBeijingChina

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