Influence of shear deformation on the normal force of magnetorheological elastomer
Abstract
The influence of shear deformation on the normal force of magnetorheological elastomer was investigated. In quasi-static shear, the normal force decreases with increasing shear strain at low magnetic field, while increases with increasing shear strain when the magnetic field exceeds 452mT. In oscillatory shear, the normal force shows similar trend. However, it decreases sharply when the strain amplitude exceeds 7%. A microstructure based theory was proposed to investigate this phenomenon. Under shearing, the elastic modulus decreases while the magnetic torque increases, which lead to the different trends of normal force at different magnetic fields. This mechanism agrees well with the experimental results.
- Publication:
-
Materials Letters
- Pub Date:
- September 2013
- DOI:
- 10.1016/j.matlet.2013.05.035
- Bibcode:
- 2013MatL..106..270L
- Keywords:
-
- Polymers;
- Magnetic materials;
- Microstructure;
- Magnetorheological elastomer;
- Shear deformation;
- Normal force