Thermo-Electro-Mechanical Analysis of a Curved Functionally Graded Piezoelectric Actuator with Sandwich Structure

Yan, Zhao; Zaman, M. K.; Jiang, Liying

doi:10.3390/ma4122151

Cited by 14 publications

(7 citation statements)

References 32 publications

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“…The future direction of the present research may include a comprehensive study of the blending of some of the commonly known reinforcing agents, such as carbon nanotubes and graphene, with Nylon-6, since these substances possess an excellent potential in terms of mechanical resistance, biocompatibility, and various uses in sensors and conductive devices [47,48,49,50,51,52,53]. Blending these substances may lead to the generation of advanced materials to be employed for the additive manufacturing of strong, flexible, and durable structures for a variety of commercial uses [49,54], which need to be investigated via mechanical testing and the microstructure characterization conducted through optical and scanning electron microscope imaging.…”

Section: Discussionmentioning

confidence: 99%

High-Performance Nylon-6 Sustainable Filaments for Additive Manufacturing

et al. 2019

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This study deals with the development of Nylon-6 fused deposition modeling (FDM) filaments for additive manufacturing, which couples high mechanical performances with eco-sustainability. These filaments were extruded from recycled Nylon-6 granulates through a dedicated twin-screw extrusion line, which processes either pure Nylon-6 grains, or mixtures of such a material with minor fractions of acrylonitrile butadiene styrene (ABS) and titanium dioxide (TiO2). The rheological and thermal properties of the investigated filaments are analyzed, including melt flow index, melting temperature, and decomposition temperature, which are of the utmost importance when avoiding the overheating and decomposition of the material. Such a study is conducted in both pre-extrusion and post-extrusion conditions. The tensile strength, the wear resistance, and the printability of the examined recycled Nylon-6 filaments are also studied by comparing the properties of such filaments with those exhibited by different nylon-based filaments for FDM that are available in the market. The given results show that the recycling of Nylon-6 through the “caprolactam” regeneration route enables the newly formed material to retain high physical and mechanical properties, such as tensile strength at yield in the interval 55.79–86.91 MPa. Referring to the basic composition of the filaments examined in the present study, this remarkably high-yield strength is accompanied by a Young modulus of 1.64 GPa, and wear resistance of 92 µm, under a 15 min/1 kg load pin-on-disk test carried at the sliding speed of 250 rpm.

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Section: Discussionmentioning

confidence: 99%

High-Performance Nylon-6 Sustainable Filaments for Additive Manufacturing

et al. 2019

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“…Bimorphs, which are commonly used as a fundamental element in many operating devices, are made of two piezoelectric sheets bonded together [24]. They were also used to control the vibration of a helicopter rotor blade with limited success [25].…”

Section: Configuration Of Bending Piezoelectric Bimorphsmentioning

confidence: 99%

Development of a Micro-Gripper Using Piezoelectric Bimorphs

El‐Sayed

Abo-Ismail

El-Melegy

et al. 2013

Sensors

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Piezoelectric bimorphs have been used as a micro-gripper in many applications, but the system might be complex and the response performance might not have been fully characterized. In this study the dynamic characteristics of bending piezoelectric bimorphs actuators were theoretically and experimentally investigated for micro-gripping applications in terms of deflection along the length, transient response, and frequency response with varying driving voltages and driving signals. In addition, the implementation of a parallel micro-gripper using bending piezoelectric bimorphs was presented. Both fingers were actuated separately to perform mini object handling. The bending piezoelectric bimorphs were fixed as cantilevers and individually driven using a high voltage amplifier and the bimorph deflection was measured using a non contact proximity sensor attached at the tip of one finger. The micro-gripper could perform precise micro-manipulation tasks and could handle objects down to 50 µm in size. This eliminates the need for external actuator extension of the microgripper as the grasping action was achieved directly with the piezoelectric bimorph, thus minimizing the weight and the complexity of the micro-gripper.

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“…Bimorph bender is characterized by a central passive layer sandwiched between two piezoelectric laminae. Electrodes are applied on the upper and lower surfaces of each piezoelectric layer (Kang and Wang, 2010;Yan et al, 2011). For this type of actuator, deformations induced by the electric field lead to deflection of the device which act as a cantilever.…”

Section: Introductionmentioning

confidence: 99%

Design of thermo-piezoelectric microstructured bending actuators via multi-field asymptotic homogenization

Fantoni

Bacigalupo

Paggi

2018

International Journal of Mechanical Sciences

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The use of integrated MicroElectroMechanical systems (MEMS) is recently spread thanks to their improved sensitivity, accuracy and reliability. Accurate preliminary computations born from the need of high precision in the manufacturing process of such devices. Piezoelectric materials are broadly employed in this field as direct converters between mechanical and electrical signals and some of these piezoelectric materials show pyroelectric features, which involve thermo-electrical interactions. Pyroelectric bending actuators are analyzed in the present study in plane conditions. They consists of active PZT layers with in-plane polarization and a microstructured composite layer characterized by a periodic microstructure where PZT fibers with an out of plane polarization are immersed in a polymeric matrix. The constitutive law of the composite layer at the macroscale has been determined by means of a multi-field asymptotic homogenization technique, recently developed for thermo-piezoelectric materials. Overall constitutive equations characterizing the behavior of the microstructured layer at the macroscale have been derived and the closed form of the overall constitutive tensors has been provided for the equivalent first-order (Cauchy) homogenized continuum. Deflection of unimorph and bimorph bender actuators has been investigated in relation to their geometrical features, exploiting the out of plane piezoelectric properties of the composite layer, which modify the stiffness of the entire bender. An accurate description of benders behavior at the structural length scale is of fundamental importance in order to design devices with high performances. In this regard, the influence of the microstructure on the global response of the actuator is investigated in the present study in order to understand how the composite material can be tailored to meet specific design requirements.

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Thermo-Electro-Mechanical Analysis of a Curved Functionally Graded Piezoelectric Actuator with Sandwich Structure

Cited by 14 publications

References 32 publications

High-Performance Nylon-6 Sustainable Filaments for Additive Manufacturing

High-Performance Nylon-6 Sustainable Filaments for Additive Manufacturing

Development of a Micro-Gripper Using Piezoelectric Bimorphs

Design of thermo-piezoelectric microstructured bending actuators via multi-field asymptotic homogenization

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