Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 431, Issue -, Pages 262-265Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2016.10.009
Keywords
Magneto-sensitive elastomer; Magnetic hybrid material; Young's modulus; Eigenfrequency; Bending vibrations
Funding
- Deutsche Forschungsgemeinschaft (DFG)
- Russian Foundation for Basic Research (RFBR) [DFG PO 2013/1-1, BO 3343/1-1, RFBR 16-53-12009]
- DFG priority program [SPP 1681, ZI 540-17/2]
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The development of sensor systems with a complex adaptive regulation of the operating sensitivity and behaviour is an actual scientific and technical challenge. Smart materials like magneto-sensitive elastomers (MSE) are seen as one potential solution for this problem, since their mechanical properties may be controlled by external magnetic fields. The present paper deals with the investigation of elastic and damping properties of MSE containing magnetically soft particles under the influence of a uniform magnetic field. Based on the measurement of the first eigenfrequency of free bending vibrations of a fixed beam, the effective Young's modulus is evaluated theoretically and also numerically using Finite Element Method. It is shown that this parameter, as well as the first eigenfrequency of the beam, increases monotonically with the magnitude of the applied magnetic field. The results are aimed to develop an acceleration sensor with adaptive magnetically controllable sensitivity range for the detection of external mechanical stimuli of the environment.
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