Rekonfigurabilni vzorci na površini magneto-aktivnih elastomerov

magistrsko delo

Matija Lovšin (Author), Irena Drevenšek Olenik (Mentor)

Abstract

Magneto-aktivni elastomeri so kompozitni materiali, katerih fizikalne lastnosti se spremenijo pod vplivom zunanjega magnetnega polja. V odsotnosti magnetnega polja so elastični, v magnetnem polju pa postanejo plastični. Na osnovi tega pojava lahko dosežemo učinek oblikovnega spomina. V sklopu magistrskega dela sem analiziral oblikovni spomin na površini magneto-aktivnih elastomerov. V površino sem odtisnil periodično mikrostrukturo in analiziral uklon laserskega žarka na njej v odvisnosti od magnetnega polja. Na osnovi dobljenih rezultatov sem pridobil informacijo o globini odtisnjenega vzorca v odvisnosti od magnetnega polja ter o časovnem poteku površinske rekonstrukcije po hitrem izklopu magnetnega polja. Ugotovil sem, da se mikrostrukturne spremembe na površini obnašajo podobno tistim, ki so jih predhodno opazovali na makroskopskih vzorcih.

Keywords

magneto-aktivni elastomeri;magneto-reološki pojav;oblikovni spomin;uklon svetlobe;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.09 - Master's Thesis
Organization:	UL FMF - Faculty of Mathematics and Physics
Publisher:	[M. Lovšin]
UDC:	539.211
COBISS:	75087363
Views:	209
Downloads:	45
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Reconfigurable patterns on the surface of magneto-active elastomers
Secondary abstract:	Magnetoactive elastomers are composite materials whose physical properties change under the influence of an external magnetic field. In the absence of magnetic field, they are elastic, while in magnetic field they become plastic. Based on this phenomenom, shape memory effect can be achieved. Within my master's thesis, I analyzed the shape memory effect on the surface of magnetoactive elastomers. I embossed a periodic microstructure on the surface and analyzed optical diffraction from it as a function of the magnetic field. Based on those results, I obtained information on the depth of the imprinted structure as a function of the magnetic field and on the time dependence of surface restructuring after a rapid switch-off of the magnetic field. I found that the microstructural changes behave similarly to those previously observed on macroscopic samples.
Secondary keywords:	magnetoactive elastomers;magnetorheological effect;shape memory effect;optical diffraction;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za fiziko
Pages:	52 str.
ID:	13522148