TY - GEN
T1 - Analytical modeling of a segmented magneto-active elastomer unimorph actuator
AU - Pan, Tan
AU - Leng, Rui
AU - Ounaies, Zoubeida
AU - Frecker, Mary
N1 - Funding Information:
We thank Dashiell Papula (The Pennsylvania State University) for the mechanical testing and VSM data, and Cody Gonzalez (The Pennsylvania State University) for assistance with the model approach. The authors gratefully acknowledge the support of the National Science Foundation grant number 1953259.
Publisher Copyright:
© 2021 by ASME.
PY - 2021
Y1 - 2021
N2 - Magneto-active elastomers (MAE) are capable of achieving large deflections when actuated using an external magnetic field. Desired shape changes are achieved by judiciously designing a unimorph actuator comprised of an active MAE layer and a passive material substrate. In this paper, an analytical model is developed to predict the shape change of an MAE unimorph actuator that is segmented along its length. The shape change performance of a unimorph actuator consisting of polydimethylsiloxane (PDMS) embedded with barium hexaferrite (BHF) particles and a passive substrate of Scotch tape is investigated for different segmented geometric configurations. An Euler-Bernoulli model is developed to predict the free deflection and blocked force of the segmented unimorph given the geometric information, properties of the materials, and the external magnetic field strength. A numerical approach is also developed to account for consecutive segments and different conditions for each segment as the unimorph bends. The conditions include the spatial variation of the magnetic field and the dependence of actuation torque on the bending angle. The model is validated with experiments under the same conditions, and the outcomes show good agreement with the experimental results. The validated model is used in a parametric study to assess the effects of the geometric parameters, material properties, and the magnitude of the magnetic field on the shape change.
AB - Magneto-active elastomers (MAE) are capable of achieving large deflections when actuated using an external magnetic field. Desired shape changes are achieved by judiciously designing a unimorph actuator comprised of an active MAE layer and a passive material substrate. In this paper, an analytical model is developed to predict the shape change of an MAE unimorph actuator that is segmented along its length. The shape change performance of a unimorph actuator consisting of polydimethylsiloxane (PDMS) embedded with barium hexaferrite (BHF) particles and a passive substrate of Scotch tape is investigated for different segmented geometric configurations. An Euler-Bernoulli model is developed to predict the free deflection and blocked force of the segmented unimorph given the geometric information, properties of the materials, and the external magnetic field strength. A numerical approach is also developed to account for consecutive segments and different conditions for each segment as the unimorph bends. The conditions include the spatial variation of the magnetic field and the dependence of actuation torque on the bending angle. The model is validated with experiments under the same conditions, and the outcomes show good agreement with the experimental results. The validated model is used in a parametric study to assess the effects of the geometric parameters, material properties, and the magnitude of the magnetic field on the shape change.
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U2 - 10.1115/SMASIS2021-67703
DO - 10.1115/SMASIS2021-67703
M3 - Conference contribution
AN - SCOPUS:85118129277
T3 - Proceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
BT - Proceedings of ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2021
Y2 - 14 September 2021 through 15 September 2021
ER -