“Development and research of device for magnetorheological fluids parameters setting” Doctoral Thesis

Author, institution: Viktorija Mačiukienė, Kaunas University of Technology

Science area, field: Technology Sciences, Mechanical Engineering – 09T

The Doctoral Dissertation is available at the libraries of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas) and Aleksandras Stulginskis University (Studentų g. 11, Akademija, Kauno raj.).

Scientific Supervisor: Prof. Dr. Egidijus DRAGAŠIUS (Kaunas University of Technology, Technology Sciences, Mechanical Engineering – 09T).

Scientific Advisor: Doc. Dr. Vytautas JŪRĖNAS (Kaunas University of Technology, Technology Sciences, Mechanical Engineering – 09T).

Dissertation Defence Board of Mechanical Engineering Science Field:
Assoc. Dr. Giedrius JANUŠAS (Kaunas University of Technology, Technology Sciences, Mechanical Engineering – 09T) – chairman;
Prof. Dr. Habil. Edmundas KIBIRKŠTIS (Kaunas University of Technology, Technology Sciences, Mechanical Engineering – 09T);
Prof. Dr. Evguenia KOROBKO (Luikov A.V. Heat and Mass Transfer Institute, Belarus, Technology Sciences, Materials Engineering – 08T);
Prof. Dr. Habil. Piotr VASILJEV (Lithuanian University of Educational Sciences, Technology Sciences, Mechanical Engineering – 09T).

Annotation:
Magnetorheological and electrorheological fluids (MRS and ERS) belong to the group of active fluids that are increasingly used in different mechatronic devices. Using these smart and active fluids, the energy consumption and weight of construction can be reduced, conversely  velocities and validity are increased.  The main rheological fluids properties testing device is rheometer (expensive and stationary device). This predicament of measuring conditions raised the main aim of the research – to create cheap, mobile and locally measuring magnetorheological fluid characteristic devices. Combining the piezoelectric actuator positive qualities and challenges raised by research,  several magnetorheological fluid monitoring and diagnostic systems or methods have been developed.
The aim of the dissertation – create reliable, mobile revise device, capable of being locally set for magnetorheological fluid rheological properties.
The thesis was carried out by means of theoretical, analytical and experimental research. With this software package, the electromagnet magnetic field distribution in a magnetic conductor and bending deformation type piezoelectric actuator working were calculated. The experiments of active fluids were performed in the created two active fluids rheological parameters measuring and monitoring systems. One of them multifunctional – for sedimentation phenomena detection and removal. The other one, the main part of this dissertation – a magnetorheological fluid dynamic viscosity measuring system. Using such kind of devices is enough for the exact measurement of magnetorheological fluid rheological properties. The economic aspects of these measurement devices is highly acclaimed, because the practice value is very high and price is very low.