Different interface models for calculating the effective properties in piezoelectric composite materials with imperfect fiber–matrix adhesion

Brito-Santana, Humberto; Medeiros, Ricardo de; Rodrı́guez-Ramos, Reinaldo; Tita, Volnei

doi:10.1016/j.compstruct.2016.02.003

Cited by 29 publications

(26 citation statements)

References 37 publications

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“…They can be placed more efficiently in the unit-cell, leading to higher packing factors as well as providing generally flexible structures [10] with low acoustic impedance values [11]. Randomly oriented fiber structures, however, can provide higher values in transverse directions compared to aligned structures and can be easier to manufacture [12][13][14][15].…”

Section: Resultsmentioning

confidence: 99%

Effects of unit-cell boundary type on the electromechanical properties of randomly distributed multifunctional composite structures

Martin¹,

Challagulla²

2018

EasyChair Preprints

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Abstract-The unit-cell composition of three-dimensional finite element models for 3-0 and 3-1 type polymer (PVDF) -ceramic (BaTiO3) and ceramic (PZT-7A) -ceramic (BaTiO3) structures are compared to determine the effects of fiber interaction at the surface of the unit-cell on the effective elastic, piezoelectric and dielectric properties of the multifunctional composite systems. The first unit-cell type examined has enclosed fibers that are completely contained within its boundaries, the second type has fibers that are contained within the sides of the unit-cell but can be cut at the top and bottom surfaces, and the third type has fibers that can be cut on the top, bottom and side surfaces of the unit-cell. All cut fibers are matched on opposing surfaces for continuity. Randomly distributed and aligned circular fibers, randomly distributed and randomly oriented circular fibers, and one central enclosed fiber with varying volume fractions and aspect ratios are compared with these three unit-cell structures. Results show that fiber models display greater or equal values of C "" when compared to aligned or randomly oriented fibers for all cases except aspect ratio 1 polymer-ceramic structures. The third type of unit-cell shows the highest e "" values for single, aligned and randomly oriented fiber structures, except for the aspect ratio 10 polymerceramic case where the second type of unit-cell has greater results for aligned and single fibers. Finally, it can generally be seen that randomly oriented fibers have smaller values than similar aligned and single fiber structures with the exception being C "" of the ceramic-ceramic structures.

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Section: Resultsmentioning

confidence: 99%

Effects of unit-cell boundary type on the electromechanical properties of randomly distributed multifunctional composite structures

Martin¹,

Challagulla²

2018

EasyChair Preprints

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“…In addition, the volume fraction of an interphase should also be set beforehand. As reported by many researchers 35,36 , the interface damage can be simulated by an interphase stiffness degradation. In other words, the interphase is an approximation of an interface but not means a real interphase material.…”

Section: Experimental Validationmentioning

confidence: 94%

“…For a composite with interface damage, an imperfect interface condition must be considered. It is reported that an interphase model 35,36 can approximate an imperfect interface. Thus, a three-phase CCA model as shown in Fig.…”

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confidence: 99%

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A micromechanics based elasto-plastic damage model for unidirectional composites under off-axis tensile loads

Wang

Chen

et al. 2020

Sci Rep

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Nonlinear properties of composite materials are essential for their engineering application. In this work, a three-phase micromechanics bridging model is employed to evaluate the nonlinear behavior of a composite from properties of fiber, matrix and interphase. It is assumed that the matrix elastoplasticity and the interface damage are two major sources of the nonlinearity. The former is described by the J2 flow rule. The latter is approximated by an interphase with stiffness degradation. For an interphase, an equivalent damage stress is introduced to account for the effect of normal and shear stress on the interface damage growth. Further, an explicit empirical equation is developed to relate the equivalent damage stress and the stiffness degradation of an interphase. The present elasto-plastic damage model is validated by comparing with experimental data of a series of composites under off-axis tensile loads.

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“…Using the above-introduced spring model, the effective mechanical properties of composite materials, such as the effective modulus [25,26], thermal expansion coefficient [27], phase velocity, and attenuation [5,8,28], have been extensively investigated by taking the imperfect bonding into account. The spring model has also been used to study the influence of the imperfect bonding effect on the behaviors of the underground tunnels under various dynamic loadings [15,24,29,30].…”

Section: Introductionmentioning

confidence: 99%

Study on the Single Scattering of Elastic Waves by a Cylindrical Fiber with a Partially Imperfect Bonding Using the Collocation Point Method

Zhang

Zeng

et al. 2018

Shock and Vibration

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The single scattering of P-and SV-waves by a cylindrical fiber with a partially imperfect bonding to the surrounding matrix is investigated, which benefits the characterization of the behavior of elastic waves in composite materials. The imperfect interface is modelled by the spring model. To solve the corresponding single scattering problem, a collocation point (CP) method is introduced. Based on this method, influence of various aspects of the imperfect interface on the scattering of P-and SV-waves is studied. Results indicate that (i) the total scattering cross section (SCS) is almost symmetric about the axis = /2 with respect to the location ( ) of the imperfect interface, (ii) imperfect interfaces located at = 0 and = highly reduce the total SCS under a P-wave incidence and imperfect interfaces located at = /2 reduce the total SCS most significantly under SV-incidence, and (iii) under a P-wave incidence the SCS has a high sensitivity to the bonding level of imperfect interfaces when is small, while it becomes more sensitive to the bonding level when is larger under SV-wave incidence.

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Different interface models for calculating the effective properties in piezoelectric composite materials with imperfect fiber–matrix adhesion

Cited by 29 publications

References 37 publications

Effects of unit-cell boundary type on the electromechanical properties of randomly distributed multifunctional composite structures

Effects of unit-cell boundary type on the electromechanical properties of randomly distributed multifunctional composite structures

A micromechanics based elasto-plastic damage model for unidirectional composites under off-axis tensile loads

Study on the Single Scattering of Elastic Waves by a Cylindrical Fiber with a Partially Imperfect Bonding Using the Collocation Point Method

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