6 April 2009 Creep effect modeling for a core free tubular actuator
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Of the range of dielectric EAP-based actuators that currently exist those having a cylindrical configuration are perhaps the most important. Up until now the most popular tubular actuator designs have exploited the exceptional pre-strain performance of the acrylics VHB 2910 and VHB 2905. Unfortunately pre-stained acrylic film rolled tubular actuators with a spring core experience problems concerning reliability and life expectancy. Partly because of these problems research is beginning to be directed towards the design, fabrication and characterisation of core free tubular actuators. This work reviews the Voltage-Strain modeling of core free rolled actuators that are constructed using a dielectric electro active polymer film that employs smart electrode technology. Position response tests, whereby a step input of 1500 V was applied to each actuator, confirmed that time dependent strain influences the Voltage-Strain behaviour of the actuators. To represent the time dependent strain behaviour a creep effect model was combined with Pelrine's electromechanical model to provide a more accurate representation of the Voltage-Strain characteristics of the actuators.
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Rahimullah Sarban, Rahimullah Sarban, Jakob Oubaek, Jakob Oubaek, Richard W. Jones, Richard W. Jones, } "Creep effect modeling for a core free tubular actuator", Proc. SPIE 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009, 72871Z (6 April 2009); doi: 10.1117/12.815425; https://doi.org/10.1117/12.815425

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