Applicability of crack energy density to fracture strength evaluation of piezoelectric ceramics

Nam, Byeung-Gun; Liu, Rongfeng; Tsuchida, Shigehiro; Watanabe, Katsuhiko

doi:10.1016/j.msea.2005.12.104

Cited by 11 publications

(1 citation statement)

References 9 publications

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“…Various attempts have been made to improve the mechanical strength of piezoelectric ceramics, and various strengthening methods that maintain the piezoelectric properties have been employed [9][10][11][12]. Understanding the fatigue properties is especially important to prevent fatigue degradation because cyclic stresses are generated when an electric field is applied [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

The control of mechanical strength by an electric field in ceramic composites dispersed with piezoelectric particles

Kishimoto

2009

J Electroceram

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The control of mechanical strength in structural ceramic composite has been proposed and demonstrated by dispersing piezoelectric particles. The change in strength of barium titanate/zirconia composite on polarization treatment was evaluated, and the mechanism of this phenomenon is discussed based on the previously proposed mechanism for monolithic piezoelectric ceramics. The bending strength of BT/8YSZ composite increased upon longitudinal poling and decreased upon transverse poling compared to the untreated samples. Both the strengthened and weakened specimens tended to return almost to their original strength by heating over the T c of barium titanate. Scanning electron microscopy was then used to examine the crack propagation after the polarization treatment, and cracks going in the poling direction were found to detour around the barium titanate grains, which was attributable to the increase in strength in the poling direction.

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Section: Introductionmentioning

confidence: 99%

The control of mechanical strength by an electric field in ceramic composites dispersed with piezoelectric particles

Kishimoto

2009

J Electroceram

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Interface crack between two interface deformable piezoelectric layers

Qiao

Chen

2009

Int J Fract

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Based on an interface deformable piezoelectric bi-layer beam model, a bonded piezoelectric bi-material beam with an interface crack perpendicular to the poling axis is analyzed within the framework of the theory of linear piezoelectricity. The layer-wise approximations of both the elastic displacements and electric potential are employed, and each sub-layer is modeled as a single linearly elastic Timoshenko beam perfectly bonded together through a deformable interface. Using the impermeable crack assumption, the closed form solutions for the energy release rate (ERR) and crack energy density (CED) are derived for the layered piezoelectric beam subjected to combined uniformly distributed electromechanical loading. Based on superposition principle, both the ERR and CED and their components are all reduced to the functions of the crack tip loading parameters. Loading dependence of the total CED with respect to the applied electric field is manifested with the analytical results, showing that there is a transformation from an even dependence to an odd dependence for the normalized CED when the applied mechanical loading increases. Compared with

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Investigation of low-temperature properties of diatomite-modified asphalt mixtures

Tan

Zhang

Xing-you

2012

Construction and Building Materials

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Applicability of crack energy density to fracture strength evaluation of piezoelectric ceramics

Cited by 11 publications

References 9 publications

The control of mechanical strength by an electric field in ceramic composites dispersed with piezoelectric particles

The control of mechanical strength by an electric field in ceramic composites dispersed with piezoelectric particles

Interface crack between two interface deformable piezoelectric layers

Investigation of low-temperature properties of diatomite-modified asphalt mixtures

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