000231725 001__ 231725
000231725 005__ 20190317000839.0
000231725 0247_ $$2doi$$a10.1063/1.4989464
000231725 022__ $$a1089-7623
000231725 02470 $$2ISI$$a000414174000045
000231725 037__ $$aARTICLE
000231725 245__ $$aAssessing the degradation of compliant electrodes for soft actuators
000231725 260__ $$bAmerican Institute of Physics$$c2017$$aMelville
000231725 269__ $$a2017
000231725 300__ $$a10
000231725 336__ $$aJournal Articles
000231725 520__ $$aWe present an automated system to measure the degradation of compliant electrodes used in dielectric elastomer actuators (DEAs) over millions of cycles. Electrodes for DEAs generally experience biaxial linear strains of more than 10%. The decrease in electrode conductivity induced by this repeated fast mechanical deformation impacts the bandwidth of the actuator and its strain homogeneity. Changes in the electrode mechanical properties lead to reduced actuation strain. Rather than using an external actuator to periodically deform the electrodes, our measurement method consists of measuring the properties of an electrode in an expanding circle DEA. A programmable high voltage power supply drives the actuator with a square signal up to 1 kHz, periodically actuating the DEA, and thus stretching the electrodes. The DEA strain is monitored with a universal serial bus camera, while the resistance of the ground electrode is measured with a multimeter. The system can be used for any type of electrode. We validated the test setup by characterising a carbon black/silicone composite that we commonly use as compliant electrode. Although the composite is well-suited for tens of millions of cycles of actuation below 5%, we observe important degradation for higher deformations. When activated at a 20% radial strain, the electrodes suffer from important damage after a few thousand cycles, and an inhomogeneous actuation is observed, with the strain localised in a sub-region of the actuator only.
000231725 700__ $$0241188$$g127048$$aRosset, Samuel
000231725 700__ $$aDe Saint-Aubin, Christine
000231725 700__ $$0246641$$g179472$$aPoulin, Alexandre
000231725 700__ $$0240376$$g162368$$aShea, Herbert
000231725 773__ $$j88$$tReview of Scientific Instruments$$k10$$q105002
000231725 8564_ $$uhttps://infoscience.epfl.ch/record/231725/files/12E4989464.pdf$$zn/a$$s21440049$$yn/a
000231725 8564_ $$uhttps://infoscience.epfl.ch/record/231725/files/NERD%20submitted.PDF$$zn/a$$s1903637$$yn/a
000231725 909C0 $$xU10955$$0252107$$pLMTS
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000231725 917Z8 $$x162368
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000231725 937__ $$aEPFL-ARTICLE-231725
000231725 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000231725 980__ $$aARTICLE