TY  - JOUR
A1  - Wache, Remi
A1  - McCarthy, Denis N.
A1  - Risse, Sebastian
A1  - Kofod, Guggi
T1  - Rotary Motion Achieved by New Torsional Dielectric Elastomer Actuators Design
JF  - IEEE ASME transactions on mechatronics
N2  - This paper reports a new way to produce a rotation motion actuated by dielectric elastomer actuators. Two specific electrode designs have been developed and the rotation of the actuator centers has been demonstrated and measured. At low strains, the rotation shows a nearly quadratic dependence with the voltage. This behavior was used to compare the performances between the two proposed designs. Among the tested configurations, a maximal rotation of 10 degrees was achieved.
KW  - Dielectric elastomer actuator (DEA)
KW  - electroactive polymer
KW  - rotation
Y1  - 2015
U6  - https://doi.org/10.1109/TMECH.2014.2301633
SN  - 1083-4435
SN  - 1941-014X
VL  - 20
IS  - 2
SP  - 975
EP  - 977
PB  - Inst. of Electr. and Electronics Engineers
CY  - Piscataway
ER  - 
TY  - JOUR
A1  - Carpi, Federico
A1  - Anderson, Iain
A1  - Bauer, Siegfried
A1  - Frediani, Gabriele
A1  - Gallone, Giuseppe
A1  - Gei, Massimiliano
A1  - Graaf, Christian
A1  - Jean-Mistral, Claire
A1  - Kaal, William
A1  - Kofod, Guggi
A1  - Kollosche, Matthias
A1  - Kornbluh, Roy
A1  - Lassen, Benny
A1  - Matysek, Marc
A1  - Michel, Silvain
A1  - Nowak, Stephan
A1  - Pei, Qibing
A1  - Pelrine, Ron
A1  - Rechenbach, Bjorn
A1  - Rosset, Samuel
A1  - Shea, Herbert
T1  - Standards for dielectric elastomer transducers
JF  - Smart materials and structures
N2  - Dielectric elastomer transducers consist of thin electrically insulating elastomeric membranes coated on both sides with compliant electrodes. They are a promising electromechanically active polymer technology that may be used for actuators, strain sensors, and electrical generators that harvest mechanical energy. The rapid development of this field calls for the first standards, collecting guidelines on how to assess and compare the performance of materials and devices. This paper addresses this need, presenting standardized methods for material characterisation, device testing and performance measurement. These proposed standards are intended to have a general scope and a broad applicability to different material types and device configurations. Nevertheless, they also intentionally exclude some aspects where knowledge and/or consensus in the literature were deemed to be insufficient. This is a sign of a young and vital field, whose research development is expected to benefit from this effort towards standardisation.
KW  - standard
KW  - dielectric elastomer
KW  - actuator
KW  - electromechanically active polymer
KW  - EAP
KW  - electroactive polymer
KW  - transducer
Y1  - 2015
U6  - https://doi.org/10.1088/0964-1726/24/10/105025
SN  - 0964-1726
SN  - 1361-665X
VL  - 24
IS  - 10
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Kollosche, Matthias
A1  - Kofod, Guggi
A1  - Suo, Zhigang
A1  - Zhu, Jian
T1  - Temporal evolution and instability in a viscoelastic dielectric elastomer
JF  - Journal of the mechanics and physics of solids
N2  - Dielectric elastomer transducers are being developed for applications in stretchable electronics, tunable optics, biomedical devices, and soft machines. These transducers exhibit highly nonlinear electromechanical behavior: a dielectric membrane under voltage can form wrinkles, undergo snap-through instability, and suffer electrical breakdown. We investigate temporal evolution and instability by conducting a large set of experiments under various prestretches and loading rates, and by developing a model that allows viscoelastic instability. We use the model to classify types of instability, and map the experimental observations according to prestretches and loading rates. The model describes the entire set of experimental observations. A new type of instability is discovered, which we call wrinkle-to-wrinkle transition. A flat membrane at a critical voltage forms wrinkles and then, at a second critical voltage, snaps into another state of winkles of a shorter wavelength. This study demonstrates that viscoelasticity is essential to the understanding of temporal evolution and instability of dielectric elastomers. (C) 2014 Elsevier Ltd. All rights reserved.
KW  - Dielectric elastomer
KW  - Viscoelasticity
KW  - Snap-through instability
KW  - Phase transition
KW  - Wrinkling
Y1  - 2015
U6  - https://doi.org/10.1016/j.jmps.2014.11.013
SN  - 0022-5096
SN  - 1873-4782
VL  - 76
SP  - 47
EP  - 64
PB  - Elsevier
CY  - Oxford
ER  -