Multilayer piezoelectric stack actuator characterization

Sherrit, Stewart; Jones, Christopher M.; Aldrich, Jack; Blodget, Chad J.; Bao, X.; Bădescu, Mircea; Bar‐Cohen, Yoseph

doi:10.1117/12.776396

Cited by 22 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When selecting actuators 33 both force output and stroke length are important considerations. So-called piezoelectric stacks can be emulated 34 . Evident in Fig.…”

Section: Resultsmentioning

confidence: 99%

Layered liquid crystal elastomer actuators

et al. 2018

View full text Add to dashboard Cite

Liquid crystalline elastomers (LCEs) are soft, anisotropic materials that exhibit large shape transformations when subjected to various stimuli. Here we demonstrate a facile approach to enhance the out-of-plane work capacity of these materials by an order of magnitude, to nearly 20 J/kg. The enhancement in force output is enabled by the development of a room temperature polymerizable composition used both to prepare individual films, organized via directed self-assembly to retain arrays of topological defect profiles, as well as act as an adhesive to combine the LCE layers. The material actuator is shown to displace a load >2500× heavier than its own weight nearly 0.5 mm.

show abstract

“…When selecting actuators 33 both force output and stroke length are important considerations. So-called piezoelectric stacks can be emulated 34 . Evident in Fig.…”

Section: Resultsmentioning

confidence: 99%

Layered liquid crystal elastomer actuators

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Finite element analysis of the Double-FCH was performed using ABAQUS in order to predict its performance. An assumption for the model consisted of the stack as an isotropic material, with effective Young’s modulus and dielectric permittivity derived based on the measured and reported dimensions, stiffnesses, piezoelectric strain coefficients and capacitances of stacks [ 32 ] (shown in Table 3 ). Piezoelectric materials were meshed with a global element size of 0.5 mm, generating 14400 hexahedral linear elements (C3D8E), while non-piezoelectric materials were meshed with total 53064 hexahedral linear elements, which have a global element size of 0.5 mm with finer elements in the thickness of flextensional frame and cantilever beam.…”

Section: Double Flextensional-cantilever Harvestermentioning

confidence: 99%

Piezoelectric Energy Harvesting in Internal Fluid Flow

Lee

Sherrit

Tosi

et al. 2015

Sensors

Self Cite

View full text Add to dashboard Cite

We consider piezoelectric flow energy harvesting in an internal flow environment with the ultimate goal powering systems such as sensors in deep oil well applications. Fluid motion is coupled to structural vibration via a cantilever beam placed in a converging-diverging flow channel. Two designs were considered for the electromechanical coupling: first; the cantilever itself is a piezoelectric bimorph; second; the cantilever is mounted on a pair of flextensional actuators. We experimentally investigated varying the geometry of the flow passage and the flow rate. Experimental results revealed that the power generated from both designs was similar; producing as much as 20 mW at a flow rate of 20 L/min. The bimorph designs were prone to failure at the extremes of flow rates tested. Finite element analysis (FEA) showed fatigue failure was imminent due to stress concentrations near the bimorph’s clamped region; and that robustness could be improved with a stepped-joint mounting design. A similar FEA model showed the flextensional-based harvester had a resonant frequency of around 375 Hz and an electromechanical coupling of 0.23 between the cantilever and flextensional actuators in a vacuum. These values; along with the power levels demonstrated; are significant steps toward building a system design that can eventually deliver power in the Watts range to devices down within a well.

show abstract

“…A good correlation between the theorotical and experimental value is observed. A detailed experimental setup to evaluate the performance of various types of piezoelectric actuators is developed and tested for both AC and DC input signals [20]. The Piezoelectric stacks were tested at extreme voltages and temperatures and at various frequency conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Performance Testing of APA Stack Actuator for a 2 DOF Microgripper

2016

IJAMAE

View full text Add to dashboard Cite

show abstract

Multilayer piezoelectric stack actuator characterization

Cited by 22 publications

References 10 publications

Layered liquid crystal elastomer actuators

Layered liquid crystal elastomer actuators

Piezoelectric Energy Harvesting in Internal Fluid Flow

Experimental Performance Testing of APA Stack Actuator for a 2 DOF Microgripper

Contact Info

Product

Resources

About