Paper Search Console

Home Search Page About Contact

Journal Title

Title of Journal: Comput Mech

Search In Journal Title:

Abbravation: Computational Mechanics

Search In Journal Abbravation:

Publisher

Springer-Verlag

Search In Publisher:

DOI

10.1007/s10764-010-9471-x

Search In DOI:

ISSN

1432-0924

Search In ISSN:
Search In Title Of Papers:

A variational constitutive framework for the nonli

Authors: Kamran A Khan Husam Wafai Tamer El Sayed
Publish Date: 2012/11/10
Volume: 52, Issue: 2, Pages: 345-360
PDF Link

Abstract

We formulate a variational constitutive framework that accounts for nonlinear viscous behavior of electrically sensitive polymers specifically Dielectric Elastomers DEs under large deformation DEs are highly viscoelastic and their actuation response is greatly affected in dynamic applications We used the generalized Maxwell model to represent the viscoelastic response of DE allowing the material to relax with multiple mechanisms The constitutive updates at each load increment are obtained by minimizing an objective function formulated using the free energy and electrostatic energy of the elastomer in addition to the viscous dissipation potential of the dashpots in each Maxwell branch The model is then used to predict the electromechanical instability EMI of DE The electroelastic response of the DE is verified with available analytical solutions in the literature and then the material parameters are calibrated using experimental data The model is integrated with finite element software to perform a variety of simulations on different types of electrically driven actuators under various electromechanical loadings The electromechanical response of the DE and the critical conditions at which EMI occurs were found to be greatly affected by the viscoelasticity Our model predicts that under a dead load EMI can be avoided if the DE operates at a high voltage rate Subjected to constant ramp and cyclic voltage our model qualitatively predicts responses similar to the ones obtained from the analytical solutions and experimental data available in the literature


Keywords:

References


.
Search In Abstract Of Papers:
Other Papers In This Journal:

  1. Simulating the pervasive fracture of materials and structures using randomly close packed Voronoi tessellations
  2. A first order method for the Cauchy problem for the Laplace equation using BEM
  3. Direct numerical simulation of the dynamics of sliding rough surfaces
  4. Three-dimensional Green’s function for an anisotropic multi-layered half-space
  5. On evaluation of hypersingular integrals over smooth surfaces
  6. Energy partitioning within a micro-particle cluster due to impact with a rigid planar wall
  7. A high order hybrid finite element method applied to the solution of electromagnetic wave scattering problems in the time domain
  8. Numerical techniques for rolling rubber wheels: treatment of inelastic material properties and frictional contact
  9. Adaptive multi-analysis strategy for contact problems with friction
  10. The total and updated lagrangian formulations of state-based peridynamics
  11. Coronary arterial dynamics computation with medical-image-based time-dependent anatomical models and element-based zero-stress state estimates
  12. Symmetric Galerkin boundary integral fracture analysis for plane orthotropic elasticity
  13. 3D fluid–structure-contact interaction based on a combined XFEM FSI and dual mortar contact approach
  14. Boundary element analysis of three-dimensional crack problems in two joined transversely isotropic solids
  15. Erratum to: Modeling a smooth elastic–inelastic transition with a strongly objective numerical integrator needing no iteration
  16. On coupling of reproducing kernel particle method and boundary element method
  17. A regularized collocation boundary element method for linear poroelasticity
  18. Detection of stiffness reductions in laminated composite plates from their dynamic response using the microgenetic algorithm
  19. A unified approach for a posteriori high-order curved mesh generation using solid mechanics
  20. Computation of turbulent vortex shedding
  21. Weighted overconstrained least-squares mixed finite elements for static and dynamic problems in quasi-incompressible elasticity
  22. Mixed state-vector finite element analysis for a higher-order box beam theory
  23. Analysis of Microelectromechanical Systems (MEMS) Devices by the Meshless Point Weighted Least-squares Method

Search Result: