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Electro-viscoelastic Modeling of Electroactive Polymers

Ask, Anna LU (2010)
Abstract
While traditionally treated separately, the research disciplines dealing with electromagnetic fields

respectively continuum mechanics are naturally connected. Not only are the basic equations formulated

in a similar way, but the presence of electromagnetic fields affect the balance equations of continuum mechanics and

likewise, the presence of material continua affect the electromagnetic fields. For certain classes of materials, the interactions between electromagnetic fields and the mechanical continuum is notably present. Such materials include piezoelectrics, which deform in the presence of electric fields and reversibly generate charge when they are deformed. Piezoelectric materials have been known for a... (More)
While traditionally treated separately, the research disciplines dealing with electromagnetic fields

respectively continuum mechanics are naturally connected. Not only are the basic equations formulated

in a similar way, but the presence of electromagnetic fields affect the balance equations of continuum mechanics and

likewise, the presence of material continua affect the electromagnetic fields. For certain classes of materials, the interactions between electromagnetic fields and the mechanical continuum is notably present. Such materials include piezoelectrics, which deform in the presence of electric fields and reversibly generate charge when they are deformed. Piezoelectric materials have been known for a long time and are used in a wide variety of technological applications. More recently, other materials where electromagnetic fields give rise to mechanical effects have been discovered and made use of. Electroactive polymers (EAP) is one class of such materials. The EAP considered in this thesis react to electric input by mechanical deformation. It has been shown that they have properties that make them comparable to natural muscle. Areas where EAP are considered include biomimetics and microrobotics, where traditional engineering materials may not be possible to use. In this thesis, these materials are treated from a continuum mechanics point of view. A phenomenological constitutive model is established which include the electromechanical behavior as well as mechanical properties traditionally associated with elastomers, such as viscosity. Furthermore, the balance equations relevant for electromechanical continua are solved numerically by means of the finite element method for some representative boundary value problems. (Less)
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Solid Mechanics, Lund Institute of Technology
language
English
LU publication?
yes
id
b58b858c-b10e-4428-943b-9624ad572e94 (old id 3166144)
date added to LUP
2012-11-19 08:19:26
date last changed
2016-09-19 08:45:10
@misc{b58b858c-b10e-4428-943b-9624ad572e94,
  abstract     = {While traditionally treated separately, the research disciplines dealing with electromagnetic fields <br/><br>
respectively continuum mechanics are naturally connected. Not only are the basic equations formulated <br/><br>
in a similar way, but the presence of electromagnetic fields affect the balance equations of continuum mechanics and <br/><br>
likewise, the presence of material continua affect the electromagnetic fields. For certain classes of materials, the interactions between electromagnetic fields and the mechanical continuum is notably present. Such materials include piezoelectrics, which deform in the presence of electric fields and reversibly generate charge when they are deformed. Piezoelectric materials have been known for a long time and are used in a wide variety of technological applications. More recently, other materials where electromagnetic fields give rise to mechanical effects have been discovered and made use of. Electroactive polymers (EAP) is one class of such materials. The EAP considered in this thesis react to electric input by mechanical deformation. It has been shown that they have properties that make them comparable to natural muscle. Areas where EAP are considered include biomimetics and microrobotics, where traditional engineering materials may not be possible to use. In this thesis, these materials are treated from a continuum mechanics point of view. A phenomenological constitutive model is established which include the electromechanical behavior as well as mechanical properties traditionally associated with elastomers, such as viscosity. Furthermore, the balance equations relevant for electromechanical continua are solved numerically by means of the finite element method for some representative boundary value problems.},
  author       = {Ask, Anna},
  language     = {eng},
  publisher    = {ARRAY(0x8577380)},
  title        = {Electro-viscoelastic Modeling of Electroactive Polymers},
  year         = {2010},
}