RT Unpublished Material
T1 Microstructural modelling of hard-magnetic soft materials: Dipole-dipole interactions versus Zeeman effect
A1 García González, Daniel
A1 Hossain, Mokarram
AB Hard-magnetic soft materials are a class of magneto-active polymers (MAPs) where the fillers are composedof hard-magnetic (magnetised) particles. These materials present complex magneto-mechanical couplings,which require the development of modelling frameworks in understanding their responses at the very beginningof conceptualisation and design. Most of the current constitutive approaches available in the literaturefor hard-magnetic MAPs do not consider dipole-dipole interactions of the embedded particles. However,such interactions among the magnetised particles generate internal forces within the composite that needto be balanced by mechanical stress from the polymeric matrix networks. This fact may imply an initialstretch of the polymeric network and suggests that such dipole-dipole interactions may be important duringthe MAP deformation process. To address these crucial points, in this contribution, we propose a novelconstitutive model relating microstructural characteristics of hard-magnetic MAPs. The model accounts forpolymeric network pre-stretch, dipole-dipole interactions, Zeeman effect as well as viscous mechanismswhich are formulated on the finite deformation theory. The results obtained herein highlight the importanceof accounting for the dipole-dipole interactions and the polymeric network pre-stretch to understand thecomplex magneto-mechanically coupled behaviour of hard-magnetic MAPs.
YR 2021
FD 2021-06-03
LK https://hdl.handle.net/10016/35270
UL https://hdl.handle.net/10016/35270
LA eng
NO D.G.G. acknowledges support from the Talent Attraction grant (CM 2018 - 2018-T2/IND-9992) from theComunidad de Madrid, and support from the European Research Council (ERC) under the European Union’sHorizon 2020 research and innovation programme (grant agreement No. 947723, project 4D-BIOMAP). M.H. acknowledges the funding through an EPSRC Impact Acceleration Award (EP/R511614/1)
DS e-Archivo
RD 18 jul. 2024