Berlin 2015 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Focus: Field Controllable Functional Polymers II

CPP 13.1: Vortrag

Montag, 16. März 2015, 15:00–15:15, C 264

Multiscale Finite Element Modeling of Magnetoactive Materials — •Philipp Metsch, Christian Spieler, and Markus Kästner — Institute of Solid Mechanics, Technische Universität Dresden, 01062 Dresden, Germany

Magnetorheological elastomers feature mechanical moduli that become strongly enhanced by an applied external magnetic field as well as the ability to generate magnetically induced deformations and mechanical actuation stresses. Typically, these materials represent a two-component system, in which micron-sized magnetizable particles are embedded in a cross-linked polymer network. Since the effective material behavior of magnetorheological elastomers is essentially determined by the constitutive properties of the individual components and their geometrical arrangement in the composite, this contribution will apply a homogenization approach for coupled magneto-mechanical problems. Starting from the properties of the magnetizable particles and the polymeric matrix, a weakly coupled model based on a continuum formulation of the problem is presented.

The governing equations are solved using the extended finite element method that allows the use of non-conforming, structured meshes which do not have to be adapted to the particle-matrix interfaces. This is advantageous if complex systems representing stochastic and structured particle distributions are considered. The obtained results are compared to those from other modeling approaches and experimental investigations.