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1
Content available Generating of electricity from magnetoelectric composite with use of changes in direction of magnetic field vector
Mech R.
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
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2017
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Nr 4
283--293
EN
Paper shows study on the magnetoelectric composite material placed in an external magnetic field with changing magnetic field vecotr. An experimental setup for investigation of magnetoelectric properties of magnetostrictive-piezoelectric material was prepared. The hybrid structure is made of magnetostrictive composite (based on Terfenol-D) and piezoelectric material. Experimental results shown the response of prepared hybrid material to the rate of changes of direction of magnetic field vector. Investigation were mainly focused on possibility of generating of electric power from prepared material. It was found that the prepared hybrid material exhibits magnetoelectric effect in the case of work when direction of magnetic field vector was changing. This effect might be use in Energy Harvesting applications.
2
Content available Influence of Terfenol-D powder volume fraction in epoxy matirx composites on their magnetomechanical properies
Mech R., Kaleta J.
Acta Mechanica et Automatica
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2017
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Vol. 11, no. 3
233--236
EN
In this paper the investigations of magnetostriction as well as DC magnetic properties for composites doped with Terfenol-D particles are presented. All investigations were performed for the materials with 35%, 46% and 70% volume fraction of the Terfenol-D particles surrounded by epoxy matrix. Moreover, the bulk Terfenol-D alloy was tested. The obtained results show that the magnetization of the composite materials increases with increasing the volume fraction of Terfenol-D particles. Similar dependence as for magnetization was observed for the magnetostriction measurements. Although the magnetostriction of composite material is smaller than for solid Terfenol-D it is still tens of times bigger than in case of traditional magnetostrictive materials. Obtained results gives opportunity to use these materials for variety applications such as actuators and sensors.
3
Content available Infulence of recrystallization on damping properties of alloy Fe75Zr4Ti3B17Cu1
Bocian M., Mech R., Myszka W., Przybylski M.
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
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2016
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Nr 4
123--134
EN
It is expected that damping in amorphous metals change after its recrystallization. For this purpose study of this phenomena was investigated. An alloy Fe75 Z r4Ti3B17Cu1 was manufactured in a very specific conditions to obtain amorphous structure. To confirm structure of the manufactured material basic testing was conducted including XRD, AFM, LFM and SEM with EDS attachment. The study showed that the structure in fact is partially amorphous and partially nanocrystalline. To determine expected change of damping sample in form of rod was tested for bounce height in controlled conditions before and after heat treatment that changed materials structure. Obtained results indicate decrease of damping after heat treatment and therefore confirms initial assumption.
4
Content available Wpływ rekrystalizacji na właściwości tłumiące stopu Fe75Zr4Ti3B17Cu1
Bocian M., Mech R., Myszka W., Przybylski M.
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych
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2016
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Nr 5
65--74
PL
Uważa się, że tłumienie w przypadku metali o strukturze amorficznej powinno ulec zmianie po ich rekrystalizacji. W niniejszej pracy przedstawiono wyniki badań tego zagadnienia. Badania przeprowadzono na stopie Fe75Zr4Ti3B17Cu1 wykonanym w taki sposób, aby otrzymać materiał o strukturze amorficznej. W celu określenia oczekiwanej zmiany w tłumieniu badanego materiału, przeprowadzono badania polegające na pomiarze wysokości odbicia, dla próbki przed obróbką termiczną i po takiej obróbce. Otrzymane rezultaty pokazały, że względne tłumienie próbki uległo zmniejszeniu po poddaniu jej obróbce cieplnej, tym samym potwierdzając wstępne założenia.
EN
It is expected that damping in amorphous metals changes after their recrystallization. For this purpose a study of this phenomena was investigated. A Fe75Zr4Ti3B17Cu1 alloy was manufactured in very specific conditions to obtain amorphous structure. To determine expected change of damping, a sample in form of a rod was tested for bounce height in controlled conditions before and after heat treatment that changed the material structure. The obtained results indicate a decrease of damping after heat treatment and therefore confirm the initial assumption.
5
Content available Magnetomechanical Properties of Composite Materials with Giant Magnetostriction
Tomiczek A. E., Mech R., Dobrzański L. A., Tański T.
Archives of Metallurgy and Materials
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2015
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Vol. 60, iss. 3A
1819--1823
EN
The aim of this work was to observe the changes in the magnetomechanical properties of composite materials with different Tb0.3Dy0.7Fe1.9 (Terfenol-D) powder particle-size distributions and varying volume fractions in the polyurethane matrix. The results show a direct relationship between the properties and the particle size of the Tb0.3Dy0.7Fe1.9 powder: the increases in the particle-size distribution of the Tb0.3Dy0.7Fe1.9 powder in the matrix amplify the magnetostrictive responses and the compressive modulus values. Moreover, it was found that the key role in efficiency of the transformation of magnetic energy into mechanical plays the initial compressing pre-stress.
PL
Celem pracy jest określenie zmian własności magnetomechanicznych materiałów kompozytowych o zróżnicowanej wielkości cząstek Tb0.3Dy0.7Fe1.9 oraz zmiennym udziale wzmocnienia w osnowie poliuretanowej. Otrzymane wyniki wskazują na bezpośrednią zależność pomiędzy własnościami a rozmiarem cząstek Tb0.3Dy0.7Fe1.9: zwiększenie ich wielkości powoduje wzrost wartości magnetostrykcji oraz modułu ściskania. Stwierdzono ponadto, że kluczową rolę w efektywnej transformacji energii magnetycznej w mechaniczną odgrywa naprężenie wstępne.
6
Content available remote Magnetostriction of field-structural composite with Terfenol-D particles
Kaleta J., Lewandowski D., Mech R.
Archives of Civil and Mechanical Engineering
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2015
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Vol. 15, no. 4
897--902
EN
The paper describes the magnetomechanical properties of magnetostrictive composites containing a 70% volume fraction of Terfenol-D powder. Except for a reference specimen, composites were subjected to polarization during curing of the resin. The results of tests showed that polarization, its direction and type have an effect on the properties of the produced composites. The highest values of magnetostriction from the manufactured composite samples were obtained for the perpendicularly polarized specimen. For a pre-stress of 7 MPa the strain amounted to 720 ppm. The results indicate that the magnetostriction of the composite increases owing not only to the proper crystallographic orientation of the material, which is usually [1 1 2], but also to the proper preparation of the specimen in this case through polarization.
7
Content available Energy harvester based on Terfenol-D for low power devices
Mech R., Kaleta J., Lewandowski D., Wiewiórski P.
Interdisciplinary Journal of Engineering Sciences
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2014
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Vol. 2, no. 1
8--12
EN
Rising requirements for a new constructions, force engineers to monitor them all day long. An attractive solution seems to be applications of wireless sensors. However, there is a barrier limiting their application, which is the need to supply them with an electrical power over extended period of time without using additional wiring or batteries. The potential solution of this problem seems to be an energy harvesting. This paper proposes a new energy harvesting device based on magnetostrictive material. In the course of the experiments with using Terfenol-D rods as actuators and sensors it has been shown, that the mechanical impact to the magnetic core based on Terfenol-D rod, NdFeB permanent magnets and coil set allowed to obtain an electric power signal enough to supply device of 100 Ohm load on their active state.
8
Content available remote Zastosowanie metody elementów skończonych do modelowania wewnątrzustrojowej protezy przełyku
Nowak A. J., Dobrzański L. A., Rybczyński R., Mech R.
Przetwórstwo Tworzyw
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2013
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[R.] 19, nr 4 (154)
384--389
PL
W pracy przedstawiono symulację komputerową wewnątrzustrojowej protezy przełyku, wykonanej z długowłóknistego materiału kompozytowego, z wykorzystaniem Metody Elementów Skończonych (MES). Modelowanie naprężeń wewnętrznych protezy wykonano w środowisku ANSYS Workbench. Dodatkowo w pracy przedstawiono zalety stosowania tego typu oprogramowania. Zastosowana MES pozwoliła na modelowanie naprężeń i odkształceń powstających w materiale kompozytowym, zarówno w warunkach odwzorowujących rzeczywiste badania doświadczalne, jak i w warunkach przybliżonych do panujących w organizmie człowieka po zaimplantowaniu protezy. Opracowana symulacja upraszcza oraz zmniejsza koszty optymalizacji własności wewnątrzustrojowej protezy przełyku przez symulację tych własności bez konieczności wykonywania dodatkowych badań laboratoryjnych.
EN
The general topic of this paper is the computer simulation with the use of Finite Element Method (FEM) for determining the internal stresses in the internal oesophageal prosthesis based on long-fibre composite material. Modelling of stresses in the internal oesophageal prosthesis was performed with the help of FEM in ANSYS environment. Application of FEM was discussed and essential advantages resulting from application of it are pointed. Applied FEM enables modelling of stresses and deformations arises in composite material in the conditions representing real experimental investigations as well as condition similar of those prevailing in human body after prosthesis implementation. Developed simulation simplifies and reduces cost of optimization of the internal oesophageal prosthesis properties by simulation of this properties without necessity of additional laboratory investigations.
9
Content available remote Finite Element Method application for modelling of internal oesophageal prosthesis
Nowak A., Dobrzański L. A., Rybczyński R., Mech R.
Archives of Materials Science and Engineering
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2013
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Vol. 64, nr 2
198--204
EN
Purpose: The general topic of this paper is the computer simulation with the use of finite element method for determining the internal stresses in the internal oesophageal prosthesis based on long-fibre composite material. Design/methodology/approach: Modelling of stresses in the internal oesophageal prosthesis was performed with the help of finite element method in ANSYS environment. Application of Finite Element Method was discussed and essential advantages resulting from application of it are pointed Findings: The presented model meets the initial criteria, which gives ground to the assumption about its usability for determining the stresses in the internal oesophageal prosthesis, employing the finite element method using the ANSYS program. The computer simulation results correlate with the experimental results. Research limitations/implications: Applied Finite Element Method enables modelling of stresses and deformations arises in composite material in the conditions representing real experimental investigations as well as condition similar to those prevailing in human body after prosthesis implementation. Originality/value: Developed simulation simplifies and reduces cost of optimization of the internal oesophageal prosthesis properties by simulation of this properties without necessity of additional laboratory investigations.
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