The effect of particle shape and distribution on the macroscopic behavior of magnetoelastic composites

• Published in: International journal of solids and structures Vol. 49; no. 1; pp. 1 - 17
• Main Authors: Galipeau, Evan, Ponte Castañeda, Pedro
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 2012; Elsevier
• Subjects: Actuation; Actuation pressure; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Decoupling; Energy methods; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Homogenizing; Magnetic properties; Magnetic properties and materials; Magnetic saturation; Magnetization; Magnetoelasticity; Magnetomechanical and magnetoelectric effects, magnetostriction; Magnetostriction; Maxwell stress; Non-linear; Particle shape; Particulate media; Physics; Solid mechanics; Static elasticity (thermoelasticity...); Stress concentration; Structural and continuum mechanics; Maxwell stress; Magnetoelasticity; Magnetostriction; Particulate media; Actuation pressure; Non-linear; Energy methods; Energy method; Modeling; Magnetorheological fluid; Combined load; Particle shape; Random medium; Magnetoelastic effect; Magnetization; Saturation; Elastomer; Homogenization; Multiaxial load; Magnetic particles; Decoupling; Magnetomechanical properties; Non linear effect; Ellipsoid; Concentration distribution
• ISSN: 0020-7683; 1879-2146
• DOI: 10.1016/j.ijsolstr.2011.08.014

The magnetoelastic homogenization framework and the partial decoupling approximation proposed by
Ponte Castañeda and Galipeau (2011) are used to estimate material properties for a class of magnetically susceptible elastomers. Specifically, we consider composites consisting of aligned, ellipsoidal magnetic particles distributed randomly with “ellipsoidal” symmetry under combined magnetic and mechanical loading. The model captures the coupling between the magnetic and mechanical fields, including the effects of magnetic saturation. The results help elucidate the effects of particle shape, distribution, and concentration on properties such as the magnetostriction, actuation stress, magnetic modulus, and magnetization behavior of a magnetorheological composite.