Elastic properties of magnetorheological elastomer: description with the two-particle mesoscopic model

Winter School on Continuous Media Mechanics

Biller, A.M.^1 ; Stolbov, O.V.^1 ; Raikher, Yu L^1

Institute of Continuous Media Mechanics UB RAS, Acad. Korolev St. 1, Perm

614013, Russia^1

关键词: Applied magnetic fields;    Field-induced changes;    Interparticle distances;    Magneto-rheological elastomers;    Magnetomechanical hysteresis;    Magnetorheological composites;    Mesoscopic modeling;    Mesoscopic structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/208/1/012007/pdf
DOI  :  10.1088/1757-899X/208/1/012007

来源: IOP

【 摘 要 】

A pair of magnetizable solid particles embedded in a cylinder made of high-elasticity material is considered as a model of a mesoscopic structure element of a magnetorheological elastomer. An applied magnetic field induces ponderomotive interaction of the particles making them to move relative to one another so as to balance the counteracting magnetic and elastic forces. In a certain parameter range, the system exhibits bistability due to which under the increase / decrease of the field, the interparticle distance changes in a hysteretic manner. This behavior has a significant effect on the ability of the mesoscopic element to resist external load. Using the developed two-particle model prone to the magnetomechanical hysteresis, we extend it to the case of a virtually macroscopic sample presenting the latter as a superposition of such elements with distributed interparticle distances. In spite of its simplicity, this scheme in a generally correct way describes the field-induced changes of the internal structure and elastic modulus of the magnetorheological composites.