Project Details
Projekt
Technical Implementation of magnetosensitive elastomers for reversibly magnetically tunable sensor systems
Applicant
Dr.-Ing. Jana Popp
Subject Area
Fluid Mechanics
Term
from 2015 to 2019
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 276806327
Classical magnetic hybrid materials contain either magnetically soft or magnetically hard particles. Thus, they show either an active magnetorheological effect or exhibit passive magnetorheological properties after magnetization of the magnetically hard particles. Within the research association a mixture of magnetically hard and soft particles in an elastomeric matrix is expected to provide a combination of active and passive magnetorheological properties. In this context, it will be the central goal of the research association to synthesize tailored magnetic hybrid materials for sensor applications based on a detailed microscopic understanding of the material properties. Within the subproject described here, the technical implementation of the magnetosensitive elastomers in sensor applications should be investigated, which mainly base on the magnetic field sensitive compliance (compliance considered as interaction of geometry and material). Macroscopic magnetomechanical properties result from the interactions between hard and soft magnetic particles and the functional elastomer matrix. The manipulation (static/dynamic) of the resulting behavior (motion, deformation) has to be studied thoroughly (e.g. for locally/temporally variable; high frequent magnetic fields). At this, the influence of the permanent magnetic field (hard magnetic particles), which interact with the basic mechanical properties of the hybrid material, must be differentiated from the influence of the external magnetic fields (soft magnetic particles) interfering to the variable compliance. Initially, the work program expects investigations of the macroscopic magnetomechanical compliance of simple geometries (measurem., experiments), following on that studies on the behavior (static/dynamic) of the magnetomechanical system already considering the abstracted sensor application (simulation, prototypes: experiments). The advanced approach to the application is accompanied by more concrete prototypes and their complex system behavior under the mentioned parameters. Additionally interesting from the engineering point of view are aspects like a biunique system response (sensor) on external mechanical stimuli, interfering magnetic fields, the basic fitting of the compliance by hard magnetic particles, finding suitable and simple measurement principles, processing and shaping of the hybrid material. At this, an intensive communication with the partners (microstructure, macroscopis properties) will accompany the project. Significant progress is expected for the development of an accelerator sensor with magnetically tunable sensitivity range. As an objective a prototype with proof of the function will be developed. Moreover, the generalized knowledge benefits directly the development of novel magnetosensitive and tunable, permanent magnetic applications.
DFG Programme
Research Grants
International Connection
Russia
Partner Organisation
Russian Foundation for Basic Research
