Results 221 to 230 of about 4,238 (264)

Active Elastomer Components Based on Dielectric Elastomers

International Polymer Science and Technology, 2015
A new design concept developed at the Fraunhofer LBF allows dielectric elastomers to be integrated efficiently as load-bearing components, serving as both actuator and sensor at the same time. Since the concept is based on perforated metal electrodes with high electrical conductivities, it can also be used for highly dynamic and acoustic applications ...
W. Kaal, S. Herold
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Folded dielectric elastomer actuators

Smart Materials and Structures, 2007
Polymer-based linear actuators with contractile ability are currently demanded for several types of applications. Within the class of dielectric elastomer actuators, two basic configurations are available today for such a purpose: the multi-layer stack and the helical structure.
CARPI, FEDERICO, Salaris, Claudio, De Rossi, Danilo   +2 more
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Helical dielectric elastomer actuators

Smart Materials and Structures, 2005
This paper presents a new type of contractile polymer-based electromechanical linear actuator. The device belongs to the class of dielectric elastomer actuators, which are typically capable of undergoing large deformations induced by an applied electric field.
CARPI, FEDERICO, Migliore, Antonio, Serra, Giorgio, De Rossi, Danilo   +3 more
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Theory of dielectric elastomers

Acta Mechanica Solida Sinica, 2010
In response to a stimulus, a soft material deforms, and the deformation provides a function. We call such a material a soft active material (SAM). This review focuses on one class of soft active materials: dielectric elastomers. When a membrane of a dielectric elastomer is subject to a voltage through its thickness, the membrane reduces thickness and ...
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CHARACTERIZATION OF DIELECTRIC ELASTOMER PLANAR ACTUATORS

Sensors and Microsystems, 2002
This work intends to extend the electromechanical characterisation of dielectric elastomer actuators. Planar actuators were realised with a 50m-thick film of an acrylic elastomer coated with compliant electrodes. The isotonic transverse strain, the isometric transverse stress and the driving current, due to a 2 s high voltage impulse, were measured for
CARPI, FEDERICO, P. Chiarelli, A. Mazzoldi, D. De Rossi   +3 more
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Contractile Hydrostatically Coupled Dielectric Elastomer Actuators

IEEE/ASME Transactions on Mechatronics, 2012
The so-called hydrostatically coupled dielectric elastomer actuators (HC-DEAs) have recently been described as a means to improve versatility and safety of electroactive polymer actuators made of DEs. HC-DEAs use an incompressible fluid that mechanically couples a DE-based active part to a passive part interfaced to the load.
CARPI, FEDERICO, Frediani, Gabriele, Rossi, Danilo De   +2 more
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Bending Dielectric Elastomer Actuators

ECS Meeting Abstracts
Dielectric Elastomer Actuators (DEAs) are a type of electroactive polymers that transform electric energy into mechanical work and are capable of large strains and high energy densities. DEAs are often described as “artificial muscles” because they exhibit strains, energy density, and responsiveness similar to natural human muscles.
Katelyn Wilson, Nikhil Deliwala, D. R. Clarke, Thiagarajan Soundappan   +3 more
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Poleable Dielectric Elastomer Composites

2017
As part of the recent efforts on renewable energies, energy harvesting by exploiting environmental motions and vibrations to generate electricity is being enthusiastically developed as a novel kind of green energy source. Piezoelectric materials are a logical choice for such applications, as they can readily generate electric charges when subjected to ...
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ENHANCING THE DIELECTRIC PERMITTIVITY OF ELASTOMERS

2008
The electromechanical transduction properties of any dielectric elastomer are intrinsically regulated by the dielectric permittivity of the material. This parameter proportionally controls both the achievable active stresses and strains. Accordingly, a suitable increase of the material permittivity may provide a valuable means to improve the ...
GALLONE, GIUSEPPE CARMINE, CARPI, FEDERICO, GALANTINI, FABIA, DE ROSSI, DANILO EMILIO   +3 more
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Dielectric Elastomer Tape Actuators

Actuators enable movement across the expanse of human invention; their role in technological advancement cannot be overstated. Revolutionary technological developments have accelerated the need for new actuators for aerospace, automotive, consumer, and medical applications: actuators that perform fast, large-strain actuation in a compact, conformable ...
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