scholarly journals A Kirigami Approach of Patterning Membrane Actuators

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 125
Author(s):  
Harti Kiveste ◽  
Rudolf Kiefer ◽  
Rain Eric Haamer ◽  
Gholamreza Anbarjafari ◽  
Tarmo Tamm
Keyword(s):  
Computer Simulations ◽  
Polyvinylidene Fluoride ◽  
Electroactive Polymers ◽  
Electroactive Polymer ◽  
Limiting Factor ◽  
Polymer Actuators ◽  
Membrane Type ◽  
Membrane Actuators

Ionic electroactive polymer actuators are typically implemented as bending trilayer laminates. While showing high displacements, such designs are not straightforward to implement for useful applications. To enable practical uses in actuators with ionic electroactive polymers, membrane-type film designs can be considered. The significantly lower displacement of the membrane actuators due to the lack of freedom of motion has been the main limiting factor for their application, resulting in just a few works considering such devices. However, bioinspired patterning designs have been shown to significantly increase the freedom of motion of such membranes. In this work, we apply computer simulations to design cutting patterns for increasing the performance of membrane actuators based on polypyrrole doped with dodecylbenzenesulfonate (PPy/DBS) in trilayer arrangements with a polyvinylidene fluoride membrane as the separator. A dedicated custom-designed device was built to consistently measure the response of the membrane actuators, demonstrating significant and pattern-specific enhancements of the response in terms of displacement, exchanged charge and force.

scholarly journals Modeling of Dielectric Electroactive Polymer Actuators with Elliptical Shapes

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5633
Author(s):  
Jakub Bernat ◽  
Jakub Kołota
Keyword(s):  
Smart Materials ◽  
Electroactive Polymers ◽  
Double Cone ◽  
Electroactive Polymer ◽  
Standard Approach ◽  
Additional Mass ◽  
Range Of Movement ◽  
Circular Shape ◽  
Polymer Actuators ◽  
The Many

Dielectric electroactive polymers have been widely used in recent applications based on smart materials. The many advantages of dielectric membranes, such as softness and responsiveness to electric stimuli, have lead to their application in actuators. Recently, researchers have aimed to improve the design of dielectric electroactive polymer actuators. The modifications of DEAP actuators are designed to change the bias mechanism, such as spring, pneumatic, and additional mass, or to provide a double cone configuration. In this work, the modification of the shape of the actuator was analyzed. In the standard approach, a circular shape is often used, while this research uses an elliptical shape for the actuator. In this study, it was shown that this construction allows a wider range of movement. The paper describes a new design of the device and its model. Further, the device is verified by the measurements.

A Multistable Linear Actuation Mechanism Based on Artificial Muscles

2010 ◽  
Vol 132 (11) ◽  
Author(s):  
Rahim Mutlu ◽  
Gürsel Alıcı
Keyword(s):  
Polyvinylidene Fluoride ◽  
Microelectromechanical Systems ◽  
Angular Displacement ◽  
Input Voltage ◽  
Electroactive Polymer ◽  
Artificial Muscles ◽  
Rectilinear Motion ◽  
Polymer Actuators ◽  
Actuation Mechanism ◽  
Polymer Actuator

In this paper, we report on a multistable linear actuation mechanism articulated with electroactive polymer actuators, widely known as artificial muscles. These actuators, which can operate both in wet and dry media under as small as 1.0 V potential difference, are fundamentally cantilever beams made of two electroactive polymer layers (polypyrrole) and a passive polyvinylidene fluoride substrate in between the electroactive layers. The mechanism considered is kinematically analogous to a four-bar mechanism with revolute-prismatic-revolute-prismatic pairs, converting the bending displacement of a polymer actuator into a rectilinear movement of an output point. The topology of the mechanism resembles that of bistable mechanisms operating under the buckling effect. However, the mechanism proposed in this paper can have many stable positions depending on the input voltage. After demonstrating the feasibility of the actuation concept using kinematic and finite element analyses of the mechanism, experiments were conducted on a real mechanism articulated with a multiple number (2, 4, or 8) of electroactive polymer actuators, which had dimensions of 12×2×0.17 mm3. The numerical and experimental results demonstrate that the angular displacement of the artificial muscles is accurately transformed into a rectilinear motion by the proposed mechanism. The higher the input voltage, the larger the rectilinear displacement. This study suggests that this multistable linear actuation mechanism can be used as a programmable switch and/or a pump in microelectromechanical systems (MEMS) by adjusting the input voltage and scaling down the mechanism further.

Electroactive polymer actuators as artificial muscles: are they ready for bioinspired applications?

2011 ◽  
Vol 6 (4) ◽  
pp. 045006 ◽  
Author(s):  
Federico Carpi ◽  
Roy Kornbluh ◽  
Peter Sommer-Larsen ◽  
Gursel Alici
Keyword(s):  
Electroactive Polymer ◽  
Artificial Muscles ◽  
Polymer Actuators

Exploration of an Electroactive Polymer as an Actuator for Microrobotics

2003 ◽  
Vol 785 ◽  
Author(s):  
C. Bielmeier ◽  
W. Walter
Keyword(s):  
Steady State ◽  
Power Consumption ◽  
Parallel Plate ◽  
Electroactive Polymers ◽  
Electroactive Polymer ◽  
Low Power Consumption ◽  
Parallel Plate Capacitor ◽  
Steady State Current ◽  
A Current ◽  
Over Time

ABSTRACTThe development of lightweight low power consumption actuators is critical to the development of micro-robotics. Electroactive Polymers (EAP), i.e. Nafion N-117, meet these requirements. In the actuation of an EAP, the current does not remain constant over time. The development of a circuit model of current draw over time to best predict a current dynamic has been explored. While the material mimics a parallel plate capacitor, it has been found that capacitance plays no role in achieving steady state current levels. This development is critical to understanding and developing the material as an actuator.

Micro-mechanics of ionic electroactive polymer actuators

2015 ◽  
Author(s):  
Andres Punning ◽  
Inga Põldsalu ◽  
Friedrich Kaasik ◽  
Veiko Vunder ◽  
Alvo Aabloo
Keyword(s):  
Electroactive Polymer ◽  
Polymer Actuators

Martian jumping rover equipped with electroactive polymer actuators: A preliminary study

2007 ◽  
Vol 43 (1) ◽  
pp. 79-92 ◽  
Author(s):  
Federico Carpi ◽  
Aldo Tralli ◽  
Danilo Rossi ◽  
Paolo Gaudenzi
Keyword(s):  
Electroactive Polymer ◽  
Polymer Actuators ◽  
Preliminary Study

Myocardial adaptation and exercise performance in patients with pulmonary arterial hypertension assessed with patient-specific computer simulations

2021 ◽  
Vol 321 (5) ◽  
pp. H865-H880
Author(s):  
Niels Thue Olsen ◽  
Christoffer Göransson ◽  
Niels Vejlstrup ◽  
Jørn Carlsen
Keyword(s):  
Pulmonary Arterial Hypertension ◽  
Arterial Hypertension ◽  
Computer Simulations ◽  
Patient Specific ◽  
Limiting Factor ◽  
Myocardial Mechanics ◽  
Use Of Data ◽  
Pulmonary Arterial ◽  
Myocardial Adaptation ◽  
Rest And Exercise

Computer simulations of the myocardial mechanics and hemodynamics of rest and exercise were performed in nine patients with pulmonary arterial hypertension and 10 control subjects, with the use of data from invasive catheterization and from cardiac magnetic resonance. This approach allowed a detailed analysis of myocardial adaptation to pulmonary arterial hypertension and showed how reduction in right ventricular inotropic reserve is the important limiting factor for an increase in cardiac output during exercise.

Sign in / Sign up

Export Citation Format

Share Document