Journal
ENGINEERING FRACTURE MECHANICS
Volume 77, Issue 18, Pages 3658-3669Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2010.07.007
Keywords
Ferroelectrics; Permeable crack; Phase field model; Polarization
Categories
Funding
- Alexander von Humboldt Foundation
- Nature Science Foundation of China [10832009]
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In the present work the polarization distribution around an open crack with different electrical boundary conditions in a single crystal ferroelectric is investigated by using a phase field model The surface effect of polarization is taken Into account in the phase field model which has not been included in previous ferroelectric crack models The simulation results show that the impermeable crack and the crack filled with air have a significant influence on the polarization distribution while the permeable and the crack filled with water have little influence It is also found that the zero boundary condition of polarization increases the influence of the crack on the permeable crack and the crack filled with water The results of the present work suggest that a crack filled with air can be approximated as an impermeable crack and a crack filled with water can be regarded as a permeable crack in ferroelectric materials (C) 2010 Elsevier Ltd All rights reserved
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