Abstract
The fracture behavior of the piezoelectric material PZT-4 in a compact tension specimen is modelled. The influence of the electrical field and mechanical load on the energy release rate and the mode mixity ratio is considered. Free charge accumulation on the crack surface is enforced in the boundary conditions and a finite element analysis is employed. The results are discussed in comparison with the results from McMeeking [1] of a crack free of extrinsic charges. It is found that the free charge on the crack surface diminishes the influence of the electric field on the energy release rate. Consequently, it may be difficult to deduce the true values of the crack tip stress intensity factor and the crack tip field intensity factor in an experiment without knowing the charge condition on the crack surface.
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Dedicated to James R. Rice on the occasion of his 60th birthday.
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© 2000 Kluwer Academic Publishers
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Haug, A., McMeeking, R.M. (2000). Energy Release Rate for a Crack with Extrinsic Surface Charge in a Piezoelectric Compact Tension Specimen. In: Chuang, T.J., Rudnicki, J.W. (eds) Multiscale Deformation and Fracture in Materials and Structures. Solid Mechanics and Its Applications, vol 84. Springer, Dordrecht. https://doi.org/10.1007/0-306-46952-9_19
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DOI: https://doi.org/10.1007/0-306-46952-9_19
Publisher Name: Springer, Dordrecht
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