2. Polymers which respond mechanically to electrical input are
termed as electro active polymers(EAPs)
Large electric field leads to couloumb forces and it termed as
maxwell effect
Introduction
3. Electrostatic itself is not enough but also to include the viscosity
of the polymer to consider time dependent effects.
Large electric field leads to couloumb forces and it termed as
maxwell effect.
Introduction
4. It is an electro-viscoelastic coupled problem including
electrostriction and time dependence present in PUelastomers.
It is assumed that the viscosity is related to the deformation of the
body but not directly to the electromagnetic field quantities.
Electric loading will make the body deform and there by induces
the viscous deformation.
Viscoelastic modeling will be based on a multiplicative split of the
deformation. And additive split of the longterm and non-
equilibrium viscous contributions of free energy.
Introduction
5. Deformation gradient is multiplicatively split into its volumetric and isochoric
parts
Deformation Tensors
13. Evolution Equations
Mandel type stresses can conveniently be used to formulate a
thermodynamically consistent model.
The format of evolution law considered here resembles an approach commonly
used in time dependent plasticity theories.
Considered function or rather potential:
15. Application to PU elastomer
For viscous strains the power law type evolution law as well as the Bonet
model are used.
A good fit to the experimental data can be found by using two viscosity
elements and k=1
16. Application to PU elastomer
For viscous strains the power law type evolution law as well as the Bonet
model are used.