Anisotropy of Fracture Toughness of Piezoelectric Ceramics

Pisarenko, G. S.

doi:10.1016/b978-1-4832-8440-8.50285-4

Cited by 16 publications

(22 citation statements)

References 4 publications

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“…This parameter is influenced by the relation between the mechanical and electrical loads. The apparent fracture toughness for a crack parallel to the poling direction was found to be higher than that obtained for a crack perpendicular to the poling direction (Pisarenko et al 1985;Tobin and Pak 1993;Shindo et al 2001;Zhang et al 2004). However, this parameter by itself should not be used to predict fracture of poled material.…”

Section: Introductioncontrasting

confidence: 62%

On fracture testing of piezoelectric ceramics

2009

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Fracture tests carried out on unpoled and poled PZT-5H four-point bend specimens are presented in this paper. The crack faces were parallel to the poling direction. Both mechanical loads and electric fields were applied to the poled specimens. The experimental results were analyzed by means of the finite element method and a conservative M-integral including the crack face boundary conditions. Fracture tests on fourpoint bend PIC-151 specimens with the crack faces perpendicular to the poling directions were also analyzed here; the experimental results were taken from the literature. A mixed mode fracture criterion is proposed for piezoelectric ceramics. This criterion is based upon the energy release rate and two phase angles. This criterion was implemented with experimental results from the literature and from this investigation. Excellent agrement was found between the fracture curve and the experimental results of the specimens with the crack faces perpendicular to the poling direction. With some scatter, reasonable agreement was observed between the fracture curve and the experimental results of the specimens with crack faces parallel to the poling direction.

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Section: Introductioncontrasting

confidence: 62%

On fracture testing of piezoelectric ceramics

2009

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“…If the initial polarization parallel to the tension, as shown in Figure 9(a), only a little number of domains switch (the change of the orientations and lengths of the electric displacement vectors reflects the amount of domain-switching), while a lot of domains switch when the initial polarization perpendicular to the tension, as shown in , we noted that if the initial polarization perpendicular to the tension, the resulting tensile stress near the crack tip decreases due to the 90° domain. This result can be used to explain the fracture anisotropy of the polarized ferroelectrics in experiments [42,43]. We also found that some domain-switching occurs at the bank of the crack and the corner in Figure 10(a), because these regions cannot afford enough confinement to limit the 90° domain switching.…”

Section: Examplementioning

confidence: 69%

Domain-switching embedded nonlinear electromechanical finite element method for ferroelectric ceramics

Liu

Fang

2011

Sci. China Phys. Mech. Astron.

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To simulate the nonlinear behavior of ferroelectric structures and devices under non-uniform electromechanical loadings, a domain-switching embedded electromechanical finite element method is developed in this paper. Following continuum assumption, the electromechanical behavior of each representative material point can be obtained by averaging the behavior of the local corresponding microstructure, e.g. 42 domains used in this work. A new Double Gibbs free energy criterion for domain-switching is proposed to ensure the convergence and stability of the simulations on ferroelectrics under non-uniform field.Several computational examples are given to demonstrate that this nonlinear finite element method can yield reasonable and stable simulation results which can be used to explain some experimental results and assist the design of ferroelectric devices. ferroelectric material, domain-switching, finite element method, nonlinear electromechanical coupling, crack and fracture PACS: 77.80.Dj, 85.50.-n, 07.05.Tp

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“…However, it is indicated in the preceding studies, e.g., see [10,11,61], that the assumption of isotropic fracture toughness may not be appropriate to be considered for polarized materials like piezoelectricity. It is because that the polarized materials naturally have anisotropic properties.…”

Section: A Mixed-mode Inclined Edge Crack In a Piezoelectric Plate Unmentioning

confidence: 96%

“…In other words, the fracture toughness greatly affects the orientation of growing crack, and this issue should be profoundly considered once dealing with crack growth. Therefore, the fracture toughness anisotropy [61] and the maximum modified hoop stress intensity factor [11] are taken into account in this study.…”

Section: A Mixed-mode Inclined Edge Crack In a Piezoelectric Plate Unmentioning

confidence: 99%

“…Therefore, apart from the numerical study on stationary cracks under static and dynamic loading conditions, crack propagation in piezoelectric materials using the proposed XIGA is also presented in this paper. By accomplishing it, the maximum modified hoop stress intensity factor criterion [11] and anisotropic fracture toughness behavior of electromechanical materials [61] are taken.…”

Section: Approach and Objectivementioning

confidence: 99%

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