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Strip Dielectric Breakdown Model in Piezoelectric Fracture Mechanics

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Encyclopedia of Thermal Stresses

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Synonyms

Electrically insulating cracks; Failure criteria; Fracture; Impermeable cracks; J-integral; Piezoelectric materials; Strip dielectric breakdown model; Strip polarization saturation model

Definition

Piezoelectric materials are electrically insulators. Conventional cracks in piezoelectric materials are electrically insulating cracks. The medium inside an electrically insulating crack is vacuum, air, or other dielectric medium and no electrically conductive medium is coated along the crack faces.

Impermeable cracks hypothetically refer to a group of electrically insulating cracks, along which surfaces the impermeable electric boundary condition is applied. The electrically impermeable boundary condition requires zero electric displacement components, perpendicular to the crack surface, along both upper and lower crack surfaces. Impermeable cracks assume that no electric field exists inside the cracks. The electrically impermeable boundary condition is an extreme case in the...

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Acknowledgments

The author would like to thank Prof. MH Zhao, Prof. CF Gao, Prof. HJ Gao, and Prof. P Tong for their contributions to this entry. The work was supported by a General Research Fund, with the project number of 622610, from the Hong Kong Research Grants Council, HKSAR, China.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, People’s Republic of China

    Tong-Yi Zhang

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  1. Tong-Yi Zhang
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Correspondence to Tong-Yi Zhang .

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Editors and Affiliations

  1. Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY, USA

    Richard B. Hetnarski

  2. Naples, FL, USA

    Richard B. Hetnarski

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Zhang, TY. (2014). Strip Dielectric Breakdown Model in Piezoelectric Fracture Mechanics. In: Hetnarski, R.B. (eds) Encyclopedia of Thermal Stresses. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2739-7_128

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