Simulation of Uniaxial Deformation of a Ferrogel Sample Exposed by the External Magnetic Field

21st Winter School on Continuous Media Mechanics

计算机技术

Melenev, P.^1^2 ; Ryzhkov, A.^2^3

Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg

620026, Russia^1

Institute of Continuous Media Mechanics, Perm Federal Research Centre, Perm

614013, Russia^2

Applied Mathematics and Mechanics Faculty, Perm National Research Polytechnical University, Perm

614000, Russia^3

关键词: Coarse-grained molecular dynamics;    Equilibrium magnetization;    External magnetic field;    Ferromagnetic particles;    Magnetic interactions;    Mechanical behaviour;    Numerical investigations;    Single domain particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/581/1/012039/pdf
DOI  :  10.1088/1757-899X/581/1/012039

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Ferrogels are magnetoactive composite materials with very soft hydrogel matrix, filled by ferromagnetic particles. This work is devoted to a numerical investigation of magneto-mechanical behaviour of a small sample of ferrogel. Our model is based on a coarse grained molecular dynamics approach: polymeric matrix is emulated by lattice of bead-strings chains and magnetic single-domain particles are considered as rigid spheres and placed in a nodes of the lattice. This model was previously successfully used for a research of equilibrium magnetization of the material. Here we examine of the reaction of ferrogel sample on uniaxial tension in presence of an external magnetic field. Modelling proves that key role in a changes of mechanical response during the magnetization plays an internal structure of material, specifically, the existence of particles aggregates, induced by forces of dipolar magnetic interaction. Also the influence of magnetic anisotropy on a process is considered.