Electromechanical modeling and experimental verification of a directly printed nanocomposite

Nafari, Alireza; Sodano, Henry A.

doi:10.1117/12.2300383

Cited by 2 publications

(3 citation statements)

References 39 publications

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“…Using the RSA procedure [54] an RVE containing non-intersecting fibers was generated in MATLAB (Version R2016a), and subsequently imported into COMSOL Multiphysics for FEM analysis. The RSA method [55] has been widely used for the study of composite materials with different types of active phases such as cylindrical [56][57][58], spherical [56,59], ellipsoidal [59], and sphero-cylinderical [56] shapes. For a fiber reinforced composite with a low volume fraction of low AR fillers, the fibers can be considered as straight cylinders.…”

Section: Finite Element Modelingmentioning

confidence: 99%

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Electromechanical modeling and experimental verification of a direct write nanocomposite

Nafari

Sodano

2019

Smart Mater. Struct.

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Piezoelectric materials are currently among the most promising building blocks for sensing, actuation and energy harvesting systems. However, these materials are limited in certain applications due to their lack of machinability as well as their inability to conform to curved surfaces. One method to mitigate this issue is through additive manufacturing (direct printing) of piezoelectric nanocomposites, where piezoelectric nanomaterials are embedded in a polymer matrix. Although significant progress has been made in this area, filler morphology, alignment and volume fraction are critical parameters that influence the electromechanical response and have not been adequately modeled. With the advent of additive manufacturing it is now possible to realize directly printed nanocomposites with tailored microstructure. The objective of this study is to develop and experimentally validate micromechanical and finite element models that allow the study of the electroelastic properties of a directly printed nanocomposite containing piezoelectric inclusions. Furthermore, the dependence of these properties on geometrical parameters such as aspect ratio and alignment of the active phase are investigated. In particular, the core focus of this work is to demonstrate how the gradual alignment of piezoelectric nanowires in the nanocomposite from randomly oriented to purely aligned can improve electroelastic properties of a printed nanocomposite. Finally, this work provides the first experimental validation of the theoretical and FEM models through measurement of the electroelastic properties of the nanocomposites containing barium titanate nanowires in a polydimethylsiloxane (PDMS) polymer matrix.

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Section: Finite Element Modelingmentioning

confidence: 99%

“…The sample was evaluated using a 5 Hz sinusoidal strain with 0.5% amplitude while the force and voltage were recorded. Based on the force measured by the DMA (F rms ) and output voltage (V rms ) measured by the electrometer (Keysight, B2985A), the d 31 coefficient was calculated as [55,66]…”

Section: Nanocomposite Coupling Measurementsmentioning

confidence: 99%

Electromechanical modeling and experimental verification of a direct write nanocomposite

Nafari

Sodano

2019

Smart Mater. Struct.

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“…Присущая этим композитам способность преобразовывать механическую энергию в электрическую и наоборот делает их чрезвычайно популярными в качестве исполнительных механизмов и датчиков в микроустройствах [2,3]. Некоторые примеры таких полимерных композитовполидиметилсилоксан (PDMS)/титанат бария (BaTiO 3 ) [4], SU8/оксид цинка (ZnO) [5], PDMS/ниобат магния -титанат свинца (PMN-PT) [6], эпоксид/PMN-PT [7]. Использование микромеханических моделей для предсказания эффективных свойств композитов снижает стоимость и время физических экспериментов.…”

Section: Introductionunclassified

Сравнительное Исследование Инкрементальной Самосогласованной И Эшелби–Mори–Tанака Моделей Для Оценки Электроупругих Свойств Пьезоэлектрических Полимерных Композитов С Ортотропной Матрицей

Мишра¹,

Дас²

2022

mkm

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Оценена эффективность двух микромеханических моделей – инкрементальной самосогласованной (ISC) и модифицированной Эшелби–Мори–Танака (EMT) – для предсказания эффективных электроупругих свойств однонаправленных пьезоэлектрических полимерных композитов с ортотропной полимерной матрицей, особенно при большом объемном содержании арматуры. Эффективные электроупругие свойства композитов на основе пьезокерамики PZT-7A и поливинилиденфторида (PVDF) определены с использованием обеих моделей и сопоставлены с рассчитанными с помощью конечно-элементной модели на основе представительных объемных элементов (ПОЭ). Рассмотрены композиты с двумя разными типами связности и четырьмя формами геометрии арматуры (сферической, эллипсоидальной, круглоцилиндрической и эллиптически-цилиндрической). Анализ показал, что в целом модифицированная модель EMT лучше предсказывает эффективные свойства композита.

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Electromechanical modeling and experimental verification of a directly printed nanocomposite

Cited by 2 publications

References 39 publications

Electromechanical modeling and experimental verification of a direct write nanocomposite

Electromechanical modeling and experimental verification of a direct write nanocomposite

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