Electromechanical response of porous piezoelectric materials

Manufacture and Cytotoxicity of a Lead‐free Piezoelectric Ceramic as a Bone Substitute—Consolidation of Porous Lithium Sodium Potassium Niobate by Cold Isostatic Pressing

“…Both the d 33 and the mean K p values decreased with increasing porosity (Table 2) owing to the volume fraction effect, which was consistent with previous reports (Gupta and Venkatesh, 2006;. However, the ceramics with 50% porogens demonstrated piezoelectric properties relatively higher than the theoretical value (-90 pC/N) after CIP.…”

Computational approach for composite materials with coupled constitutive laws

“…The solution of the set of differential equations (5) can be obtained by using the standard Green's functions method. It is expressible as coupled periodic Lippmann-Schwinger equations…”

“…This topic remains widely opened especially in the case of heterogeneous media which exhibit couplings in their constitutive relations. The numerical homogenization schemes usually developed in this framework rely on the use of the finite-element method (FEM) (see, for instance, [1][2][3][4][5]). One of the drawbacks of these approaches is the need of meshing which becomes tedious as soon as the complexity of the microstructure increases (e.g polycrystalline aggregates).…”

Effects of piezoelectricity on bulk waves in monoclinic poro-elastic materials

“…Experimental studies (Qian et al, 2004;Praveenkumar et al, 2005;Piazza et al, 2006) related to properties of porous piezoelectric materials and influence of porosity on its properties have been made by different authors. Gupta and Venkatesh (2006) developed a finite element model to study the effect of porosity on the electromechanical response of piezoelectric materials. Craciun et al (1998) and Gomez et al (2000) made an experimental study on wave propagation in porous piezoceramics.…”