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APPLICABILITY OF THE CRACK FACE ELECTRICAL BOUNDARY CONDITIONS IN PIEZOELECTRIC MECHANICS 被引量:1

APPLICABILITY OF THE CRACK FACE ELECTRICAL BOUNDARY CONDITIONS IN PIEZOELECTRIC MECHANICS
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摘要 The electrical boundary conditions on the crack faces and their applicability in piezoelectric materials are discussed. A slit crack and a notch of ?nite thickness in piezoelectric materials subjected to combined mechanical and electrical loads is considered. Here, a crack is de?ned as a notch without thickness, which is ?lled with air or vacuum. The crack or notch is perpendicular to the poling direction of the medium. The ideal crack face electrical boundary conditions, i.e., the electrically permeable crack and the electrically impermeable crack, are in- vestigated ?rst. Then dependence of the ?eld intensity factors on notch thickness at the notch tips is analyzed to obtain a closed-form. The results are compared with the ideal crack solutions. Some useful results are found. The electrical boundary conditions on the crack faces and their applicability in piezoelectric materials are discussed. A slit crack and a notch of ?nite thickness in piezoelectric materials subjected to combined mechanical and electrical loads is considered. Here, a crack is de?ned as a notch without thickness, which is ?lled with air or vacuum. The crack or notch is perpendicular to the poling direction of the medium. The ideal crack face electrical boundary conditions, i.e., the electrically permeable crack and the electrically impermeable crack, are in- vestigated ?rst. Then dependence of the ?eld intensity factors on notch thickness at the notch tips is analyzed to obtain a closed-form. The results are compared with the ideal crack solutions. Some useful results are found.
出处 《Acta Mechanica Solida Sinica》 SCIE EI 2004年第4期290-296,共7页 固体力学学报(英文版)
基金 Project supported by the National Natural Science Foundation of China (No. 10102004) and the Australian Research Council (DP0346037).
关键词 piezoelectric materials fracture NOTCH boundary conditions piezoelectric materials, fracture, notch, boundary conditions
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  • 1Robert M. McMeeking.Towards a fracture mechanics for brittle piezoelectric and dielectric materials[J].International Journal of Fracture.2001(1)

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