Theoretical and Numerical Modeling of Nonlinear Electromechanics with applications to Biological Active Media  

作　　者：Alessio Gizzi Christian Cherubini Simonetta Filippi Anna Pandolfi 

机构地区：[1]Nonlinear Physics and Mathematical Modeling Laboratory,I.C.R.A.Net,University Campus Bio-Medico of Rome,Via A.del Portillo 21,00128 Rome,Italy [2]International Center for Relativistic Astrophysics Network,I.C.R.A.Net,University Campus Bio-Medico of Rome,Via A.del Portillo 21,00128 Rome,Italy [3]Civil and Environmental Engineering Department Politecnico di Milano,Piazza Leonardo da Vinci 32,20133 Milano,Italy

出　　处：《Communications in Computational Physics》2015年第1期93-126,共34页计算物理通讯（英文）

摘　　要：We present a general theoretical framework for the formulation of the nonlinear electromechanics of polymeric and biological active media.The approach developed here is based on the additive decomposition of the Helmholtz free energy in elastic and inelastic parts and on the multiplicative decomposition of the deformation gradient in passive and active parts.We describe a thermodynamically sound scenario that accounts for geometric and material nonlinearities.In view of numerical applications,we specialize the general approach to a particular material model accounting for the behavior of fiber reinforced tissues.Specifically,we use the model to solve via finite elements a uniaxial electromechanical problem dynamically activated by an electrophysiological stimulus.Implications for nonlinear solid mechanics and computational electrophysiology are finally discussed.

关 键 词：Active electromechanical media Helmholtz free energy multiplicative decomposition of the deformation gradient active deformation active stress 

分 类 号：O17[理学—数学]