Effective moduli of ellipsoidal particle reinforced piezoelectric composites with imperfect interfaces

Micro-scaled size-dependence of the effective properties of 0–3 PZT–cement composites: Experiments and modeling

“…5 and 6 (the dotted data). In the next section, we will adopt a recently developed micromechanics model [32] to predict this particular phenomenon by taking the imperfect interfaces into consideration. The imperfection of interfaces between the PZT particles and the Table 1 A summary of size-effect study on Portland cement-based piezoelectric composites (particle volume = 50%) [20][21][22][23][24].…”

“…4), N À = N (with components N j ) is the unit normal pointing from the inclusion to the matrix, and N + = -N the unit normal pointing from the matrix to the inclusion. Following Wang et al [32], we use superscripts (1) and (2) to indicate the matrix and inclusion (and the interface, when necessary), respectively. The extended interface compliance coefficients K JM in Eq.…”

“…With the modified Eshelby tensor in Eq. (10), we have suggested recently a modified Mori-Tanaka method for evaluating the effective properties (C Eff ) of piezoelectric composites with spring-type imperfect interfaces [32]. Accordingly, we have …”

“…To predict the size-dependent phenomenon, we propose a continuum model into which the effect of imperfect bonding between the cement matrix and PZT-particles is incorporated. Then, a recently developed micromechanics approach or homogenization theory [32] is used to estimate the overall properties of the cement-based piezoelectric composites with imperfect interfaces. The theoretical predictions are found to agree well with the experimental results, revealing that the imperfect interfaces in the composites may be the potential source of experimentally observed size-dependent phenomenon.…”

Coupled interfacial imperfections and their effects on the fracture behavior of a layered multiferroic cylinder

“…Under harsh conditions, the interfaces in these smart composites may be damaged mechanically, electrically and/or magnetically. Therefore, there has been a new upsurge recently in studying the imperfect interfaces in piezoelectric and/or piezomagnetic composites [9][10][11][12][13]. Generally, the traditional LSMs are simply generalized to formulate the mechanical, electric and/or magnetic imperfections on the interfaces.…”