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Magnetorheological Elastomer Stress Relaxation Behaviour during Compression: Experiment and Modelling.
Mateusz Kukla1, Łukasz Warguła1, Krzysztof Talaśka1
1Institute of Machine Design, Faculty of Mechanical Engineering, Poznan University of Technology, Piotrowo 3, PL-60965 Poznan, Poland.
Materials (Basel, Switzerland)
|October 30, 2020
Summary
Magnetorheological elastomers show tunable stiffness with magnetic fields and temperature. Their stress relaxation follows a hyperbolic decline, indicating complex rheological behavior for further study.
Area of Science:
- Materials Science
- Rheology
- Engineering Materials
Background:
- Magnetorheological elastomers are advanced materials with properties tunable by magnetic fields.
- Recent years have seen a surge in scientific interest in these materials.
- Understanding their mechanical behavior is crucial for engineering applications.
Purpose of the Study:
- To investigate the mechanical properties of magnetorheological elastomers.
- To analyze the effect of magnetic field induction and temperature on stress relaxation.
- To characterize the rheological behavior of these materials under compressive stress.
Main Methods:
- Stress relaxation tests were performed on cylindrical magnetorheological elastomer samples.
- Tests were conducted under varying magnetic induction levels (0-64 mT) and temperatures (25-40 °C).
- A mathematical model was applied to analyze the stress relaxation data over 3600 seconds.
Main Results:
- Sample stiffness increased with magnetic field induction and decreased with rising temperature.
- The maximum stress amplitude change due to magnetic field was 12.7%.
- The maximum stress amplitude change due to temperature was 11.3%.
Conclusions:
- Magnetorheological elastomers exhibit significant changes in mechanical properties under magnetic fields and temperature variations.
- Stress relaxation in these materials follows a hyperbolic decline pattern.
- The extensive rheological properties necessitate further research in this domain.
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