Resonant nonlinearities of piezoelectric macro-fiber composite cantilevers with interdigitated electrodes in energy harvesting

2018 ◽  
Vol 92 (4) ◽  
pp. 1935-1945 ◽  
Author(s):  
D. Tan ◽  
P. Yavarow ◽  
A. Erturk
Keyword(s):  
Energy Harvesting ◽  
Fiber Composite ◽  
Interdigitated Electrodes ◽  
Macro Fiber Composite

Resonant Nonlinearities of Macro-Fiber Composite Cantilevers in Energy Harvesting

2017 ◽  
Author(s):  
David Tan ◽  
Paul Yavarow ◽  
Alper Erturk
Keyword(s):  
Energy Harvesting ◽  
Fiber Composite ◽  
Rectangular Cross Section ◽  
Electrical Power ◽  
Interdigitated Electrodes ◽  
Modeling And Analysis ◽  
Dissipative Effects ◽  
Macro Fiber Composite ◽  
Electrical Loads ◽  
Electrical Power Output

We explore the modeling and analysis of nonlinear non-conservative dynamics of macro-fiber composite (MFC) piezo-electric structures, guided by rigorous experiments, for resonant vibration-based energy harvesting, as well as other applications leveraging the direct piezoelectric effect, such as resonant sensing. The MFCs employ piezoelectric fibers of rectangular cross section embedded in kapton with interdigitated electrodes to exploit the 33-mode of piezoelectricity. Existing frameworks for resonant nonlinearities have so far considered conventional piezoceramics that use the 31-mode of piezoelectricity. In the present work, we develop a framework to represent and predict nonlinear electroelastic dynamics of MFC bimorph cantilevers under resonant base excitation. The interdigitated electrodes are shunted to a set of resistive electrical loads to quantify the electrical power output. Experiments are conducted on a set of MFC bimorphs over a broad range of mechanical excitation levels to identify the types of nonlinearities present and to compare the model predictions and experiments. The experimentally observed interaction of material softening and geometric hardening effects, as well as dissipative effects, is captured and demonstrated by the model.

Piezoelectric energy harvesting using macro fiber composite patches

2020 ◽  
Vol 234 (21) ◽  
pp. 4331-4349
Author(s):  
Marwa Mallouli ◽  
Mnaouar Chouchane
Keyword(s):  
Energy Harvesting ◽  
Epoxy Matrix ◽  
Composite Structures ◽  
Fiber Composite ◽  
Matrix Material ◽  
Interdigitated Electrodes ◽  
Piezoelectric Energy ◽  
Resonance Frequencies ◽  
Macro Fiber Composite ◽  
Tip Mass

Over the last decade, vibration energy harvesting has received substantial attention of many researchers. Piezoelectric materials are able to capture energy from ambient vibration and convert it into electricity which can be stored in batteries or utilized to power small electronic devices. In order to benefit from the 33-mode of the piezoelectric effect, interdigitated electrodes have been utilized in the design of macro fiber composites which are made of piezoelectric fibers of square cross sections embedded into an epoxy matrix material. This paper presents an analytical model of a macro fiber composite bimorph energy harvester using the 33-mode. The mixing rule is applied to determine the equivalent and homogenized properties of the macro fiber composite structures. The electromechanical properties of a representative volume element composed of piezoelectric fibers and an epoxy matrix between two successive interdigitated electrodes are coupled with the overall electro-elastodynamics of the harvester utilizing the Euler–Bernoulli theory. Macro fiber composite bimorph cantilevers with diverse widths are simulated for power generation when a resistive shunt loading is applied. Stress components in the Kapton layers, which are typically a part of any macro fiber composite patch, and in the bonding layers have been included in the model contrary to previously published studies. Variable tip mass, attached at the free end of the beam, is utilized in this paper to tune the resonance frequency of the harvester. The generated power at the fundamental short circuit and open circuit resonance frequencies of harvesters having three different widths is analyzed. It has been observed that higher electrical outputs are produced by the wider macro fiber composite bimorph using (M8528-P1 patches).

Magneto-Mechano-Electric (MME) Energy Harvesting Properties of Piezoelectric Macro-fiber Composite/Ni Magnetoelectric Generator

ENERGYO ◽  
2018 ◽  
Author(s):  
Rahul C. Kambale ◽  
Ju-Eun Kang ◽  
Woon-Ha Yoon ◽  
Dong-Soo Park ◽  
Jong-Jin Choi ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Fiber Composite ◽  
Macro Fiber Composite

scholarly journals Coupling of experimentally validated electroelastic dynamics and mixing rules formulation for macro-fiber composite piezoelectric structures

2016 ◽  
Vol 28 (12) ◽  
pp. 1575-1588 ◽  
Author(s):  
Shima Shahab ◽  
Alper Erturk
Keyword(s):  
Power Generation ◽  
Composite Structures ◽  
Electromechanical Coupling ◽  
Fiber Composite ◽  
Rectangular Cross Section ◽  
Mixing Rules ◽  
Modeling Framework ◽  
Interdigitated Electrodes ◽  
Macro Fiber Composite ◽  
Piezoelectric Structures

Piezoelectric structures have been used in a variety of applications ranging from vibration control and sensing to morphing and energy harvesting. In order to employ the effective 33-mode of piezoelectricity, interdigitated electrodes have been used in the design of macro-fiber composites which employ piezoelectric fibers with rectangular cross section. In this article, we present an investigation of the two-way electroelastic coupling (in the sense of direct and converse piezoelectric effects) in bimorph cantilevers that employ interdigitated electrodes for 33-mode operation. A distributed-parameter electroelastic modeling framework is developed for the elastodynamic scenarios of piezoelectric power generation and dynamic actuation. Mixing rules (i.e. rule of mixtures) formulation is employed to evaluate the equivalent and homogenized properties of macro-fiber composite structures. The electroelastic and dielectric properties of a representative volume element (piezoelectric fiber and epoxy matrix) between two neighboring interdigitated electrodes are then coupled with the global electro-elastodynamics based on the Euler–Bernoulli kinematics accounting for two-way electromechanical coupling. Various macro-fiber composite bimorph cantilevers with different widths are tested for resonant dynamic actuation and power generation with resistive shunt damping. Excellent agreement is reported between the measured electroelastic frequency response and predictions of the analytical framework that bridges the continuum electro-elastodynamics and mixing rules formulation.

Long-term fatigue behavior of a cantilever piezoelectric energy harvester

2016 ◽  
Vol 28 (9) ◽  
pp. 1188-1210 ◽  
Author(s):  
Panduranga Vittal Avvari ◽  
Yaowen Yang ◽  
Chee Kiong Soh
Keyword(s):  
Energy Harvesting ◽  
Fiber Composite ◽  
Fatigue Behavior ◽  
Piezoelectric Energy Harvesting ◽  
Mean Square ◽  
Mean Square Deviation ◽  
Base Excitation ◽  
Dimensional Model ◽  
Piezoelectric Energy ◽  
Macro Fiber Composite

Piezoelectric energy harvesting has attracted extensive research in the advancement of new designs and techniques over the last decade. The cantilever shaped piezoelectric energy harvesting beam is one of the most employed designs, due to its simplicity and flexibility for further performance enhancement. The strain distribution along the cantilever piezoelectric energy harvesting beam is nonuniform, which would induce fatigue damage at the root of the cantilever on the long run. This particular issue has seldom been addressed in the literature. This article presents an experimental investigation on the fatigue behavior of a cantilever piezoelectric energy harvesting beam at different base excitation levels. The experimental study is augmented with analytical formulation to examine the strain levels and with finite element analysis formulation to model the piezoelectric energy harvesting beam with a macro fiber composite piezoelectric transducer. A two-dimensional model is developed based on the three-dimensional model to investigate crack propagation in the piezoelectric energy harvesting beam. Furthermore, the electromechanical impedance technique is employed to monitor the progression of damage in the experimental specimens. The root mean square deviation and relative root mean square deviation of the impedance values and voltage obtained from the macro fiber composite transducer provide a profound introspection into the damage propagation in the piezoelectric energy harvesting beam. This study provides an insight into the behavior of the piezoelectric energy harvesting beam undergoing fatigue loading due to a uniform sinusoidal base excitation by analyzing the output voltage, resonant frequency, tip displacement, tip velocity, and impedance variations. It will pave the way for future studies on the fatigue-based design guides for piezoelectric energy harvesting beams.

scholarly journals Mathematical Modeling of an Active-Fiber Composite Energy Harvester with Interdigitated Electrodes

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
A. Jemai ◽  
F. Najar ◽  
M. Chafra ◽  
Z. Ounaies
Keyword(s):  
Finite Element ◽  
Energy Harvesting ◽  
Dynamic Behavior ◽  
Structural Model ◽  
Piezoelectric Materials ◽  
Fiber Composite ◽  
Interdigitated Electrodes ◽  
Active Fiber ◽  
Active Fiber Composites ◽  
Composite Energy

The use of active-fiber composites (AFC) instead of traditional ceramic piezoelectric materials is motivated by flexibility and relatively high actuation capacity. Nevertheless, their energy harvesting capabilities remain low. As a first step toward the enhancement of AFC’s performances, a mathematical model that accurately simulates the dynamic behavior of the AFC is proposed. In fact, most of the modeling approaches found in the literature for AFC are based on finite element methods. In this work, we use homogenization techniques to mathematically describe piezoelectric properties taking into consideration the composite structure of the AFC. We model the interdigitated electrodes as a series of capacitances and current sources linked in parallel; then we integrate these properties into the structural model of the AFC. The proposed model is incorporated into a vibration based energy harvesting system consisting of a cantilever beam on top of which an AFC patch is attached. Finally, analytical solutions of the dynamic behavior and the harvested voltage are proposed and validated with finite element simulations.

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