Temat: smart materials - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigations of applications of smart materials and methods in fluid valves and drives
Autorzy:: Milecki, Andrzej
Rybarczyk, Dominik
Powiązania:: https://bibliotekanauki.pl/articles/100208.pdf
Data publikacji:: 2019
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: electrohydraulics
valve
drive
smart materials
Opis:: In the paper the investigations performed at the Division of Mechtronic Devices at Poznan University of Technology in the area of application of both: smart materials in electro-hydraulic and electro-pneumatic valves, and new methods to control of hydraulic servo drives, are presented. In a first part the piezo bender actuator is shortly described and its application in servo valve is proposed. This actuator replaced the torque motor in the available on the market servo valve. The new valve simulation model is proposed. The simulation and investigations results of the servo valve with the piezo bending actuator are included. In the next part of the paper the application of piezo tube actuator in flapper-nozzle pneumatic valve is described. The test stand and investigations results are presented. Later, in the article, the Model Following Control (MFC) and Fractional order Control (FoC) methods are described. Their application in control of electrohydraulic servo drive is proposed. Some investigations results are included in the paper, showing the advantages of those control methods.
Źródło:: Journal of Machine Engineering; 2019, 19, 4; 122-134
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Influence of Terfenol-D powder volume fraction in epoxy matirx composites on their magnetomechanical properies
Autorzy:: Mech, R.
Kaleta, J.
Powiązania:: https://bibliotekanauki.pl/articles/387154.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: magnetostriction
magnetic properties
smart materials
active materials
Opis:: 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.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 3; 233-236
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Generating of electricity from magnetoelectric composite with use of changes in direction of magnetic field vector
Autorzy:: Mech, R.
Powiązania:: https://bibliotekanauki.pl/articles/347476.pdf
Data publikacji:: 2017
Wydawca:: Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:: SMART materials
Energy Harvesting
magnetostriction
active materials
Terfenol-D
Opis:: 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.
Źródło:: Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2017, 4; 283-293
1731-8157
Pojawia się w:: Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Smart materials as modern engineering substances
Autorzy:: Ćwikła, A.
Powiązania:: https://bibliotekanauki.pl/articles/102897.pdf
Data publikacji:: 2013
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: smart materials
piezoceramics
shape memory alloys
aviation
medicine
Opis:: The article presents the type and use of intelligent materials in aviation and medicine. Their basic features and properties have been discussed. Moreover, the authors quote examples of different uses of intelligent materials, both the existing ones and those in design and development stages. Their use is claimed to be increasing the efficiency and reliability of processes and equipment as well as facilitates the development of new mechanisms.
Źródło:: Advances in Science and Technology. Research Journal; 2013, 7, 17; 66-72
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: The Study of Behavior of Vibrating Systems Controllable by Devices with Rheological Fluid
Autorzy:: Szary, M. L.
Weber, P.
Powiązania:: https://bibliotekanauki.pl/articles/177066.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: noise control
vibration control
smart materials
rheological fluids
Opis:: The nonlinear mathematical model of behavior of controllable viscosity fluid (CVF) under applied external field is presented. A large family of these fluids is commonly used to control responding forces of dampers in vibration control applications. The responding force of a damper with CVF has two components. The first one - uncontrollable - is proportional to the viscosity of a base fluid and velocity of its motion, the second one, which is controllable, depends on the strength of the applied external field. Both are involved in the process of dissipation of unwanted energy from the vibrating systems. An equivalent damping factor based on the principle of energy dissipated during one cycle of damper work under a constant strength external field was calculated. When mass or stiffness is variable the equivalent damping factor can be set accordingly by adjusting the strength of external field to have vibrating damped system purposely/continuously working in the critical or other chosen state. This paper also presents cases of applying periodically changing strengths of an external field synchronized with cycles of periodical motion of the vibrating system to continuously control the damping force within each cycle.
Źródło:: Archives of Acoustics; 2013, 38, 2; 217-222
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Concept of an adaptive-tuned particles impact damper
Autorzy:: Żurawski, Mateusz
Zalewski, Robert
Chiliński, Bogumił Daniel
Powiązania:: https://bibliotekanauki.pl/articles/2055066.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: particles impact damper
adaptive-passive damping
smart materials
granular materials
Opis:: The most popular devices for attenuation of mechanical vibrations are dampers or shock absorbers. Two main energy dissipation strategies can be generally distinguished: passive and active (semi-active). Passive vibration isolation methods are the most commonly used, mainly because of their simplicity and low maintenance costs. Among passive vibration attenuation techniques, also Particle Impact Dampers (PID) are involved. Classical PID solutions have some certain limitations. This paper aims at presenting the new concept of an adaptive tuned PID damper that can pretend to be placed among semi-active energy dissipation methods.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 3; 811-816
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Numerical simulation of the beam made of magnetorheological elastomer bending in the magnetic field
Autorzy:: Miedzińska, D.
Sławiński, G.
Boczkowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/245981.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: magnetorheological elastomer
smart materials
numerical modelling
magnetic field influence
Opis:: Magnetorheological elastomers (MREs) belong to the group of so-called smart materials, which respond to an external stimulus by changing their viscoelastic properties. Magnetorheological (MR) material can be fluid, gel or solid like material, such as elastomer. The mechanical properties of the MR materials change when subjected to an external magnetic field. The MREs are interesting candidates for the active stiffness and vibration control of structural systems. In the paper the verification process of the applied FE modelling method is presented. The verification is based on the three point bending experiment. The results of that experiment were used to evaluation of the correction on numerical model and analysis. The model was based on the assumption that MRE behaves like an orthotropic material with the material properties o f MRE on the direction along the iron chains - and of a pure elastomer - on the other directions. Such an assumption can be made for the small deformations of a sample, what took place in the considered experiment. The FE modelling method was considered to be correct. On the base of the verified method a FE element model of the MRE beam bending was developed. Such MRE beams are used as "smart" switches that react under the changeable magnetic field.
Źródło:: Journal of KONES; 2010, 17, 1; 261-265
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Influence of the volume fraction of the carbonyl iron particles on the mechanical properties of the magnetorheological elastomers
Autorzy:: Sławiński, G.
Niezgoda, T.
Miedzińska, D.
Gieleta, R.
Powiązania:: https://bibliotekanauki.pl/articles/247437.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: smart materials
magnetorheological elastomer (MRE)
finite element method (FEM)
Opis:: Magnetorheological materials belong to the group of the so called intelligent materials. Their rheological properties can be changed in a large range using an external magnetic field. That is why they fmd ever growing application in modern technical equipment, among others in controlled dampers, clutches, sensors etc. In the paper, a numerical strength analysis of a magnetorheological material was presented. The influence of the volume fraction of carbonyl iron particles (the share of the carbonyl iron particles varied from 1.5 to 33.0 vol. %.) on the mechanical properties of the material were investigated, in particular on the Young's modulus variation. Experimental tests were carried out for specimens made of pure PU 70/30 elastomer with iron particles. They induded uniaxial compression tests. In the farmer case, specimens were in a shape of a cylinder with a diameter of 20 mm and a height of 25-30 mm. The results of experimental tests carried out in order to determine the parameters necessary to build the numerical model were induded in the paper. In the paper, an algorithm developed for determining the parameters for modelling the structure was presented. A fragment of the structure, containing several particles of iron and some quantity of elastomer, corresponding to the assumed volume fractions, was subjected to numerical analysis.
Źródło:: Journal of KONES; 2010, 17, 3; 401-406
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Modeling of shape memory alloy springs using a recurrent neural network
Autorzy:: Kardan, I
Abiri, R.
Kabganian, M.
Vahabi, M.
Powiązania:: https://bibliotekanauki.pl/articles/279784.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: artificial neural networks
smart materials
shape memory alloy springs
Opis:: In this paper, a recurrent neural network structure is proposed for the modeling of the behavior of shape memory alloy springs. Numerous mathematical modeling and experimental evaluations show that the force exerted by SMAs, aside from their length and applied voltages, depends on the loading path. Therefore, in addition to the applied voltage and deformation, a feedback of the voltage applied to, and the force exerted by the SMA spring in the previous time step is included in the inputs to this neural network to represent the loading path. Fed by adequate inputs, the NN estimates the output force of the spring. The results of some thermal loadings of the spring at various fixed lengths and mechanical loadings at various constant voltages are used to train the NN. The performance of the NN model is then evaluated for some constant weight loadings which are not learnt by the NN. Simulation results indicate that compared to other neural network structures, the proposed structure learns the behavior of the SMA spring faster (in less iteration). Moreover, it provides a more general model, i.e. this NN model effectively estimates the output force for almost all possible loadings.
Źródło:: Journal of Theoretical and Applied Mechanics; 2013, 51, 3; 711-718
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Vibration analysis for vehicle with vacuum packed particles suspension
Autorzy:: Makowski, M.
Zalewski, R.
Powiązania:: https://bibliotekanauki.pl/articles/282085.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Vacuum Packed Particles
vibration damping
semi-active
smart materials
Opis:: The paper concerns an effect of the damping force controlling a vehicle suspension system. The investigated vehicle suspension system consists of innovatory Vacuum Packed Particles controllable dampers which allow controlling the vehicle body vibration. The main objective of performed and presented in the paper studies is to determine properties of the Vacuum Packed Particles (VPP) damper and propose a preliminary control strategy. The control in the vehicle suspension system can be realized by controlling the underpressure resulting in various jamming mechanisms in the granular core. Some algorithms of vibration control are also proposed and discussed.
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 109-117
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Influence of cobalt admixture on the microstructure and dielectric properties of PFN ceramics
Wpływ domieszki kobaltu na mikrostrukturę i dielektryczne właściwosci ceramiki PFN
Autorzy:: Bochenek, D.
Grabowski, F.
Niemiec, P.
Powiązania:: https://bibliotekanauki.pl/articles/352912.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: materiały inteligentne
PFN
multiferroics
smart materials
ferroelectromagnetics
PFN ceramics
Opis:: Within our work a ceramic of the PFN type was obtained by a single stage method and it was subjected to a cobalt modification in the amount of: 1.0, 2.0, 3.0, 4.0 and 6.0 mol%. Studies of the influence of the cobalt admixture on the crystalline structure, microstructure and ferroelectric properties of PFN ceramics were performed. It was shown that the iso-valence PFN admixing with cobalt had a positive influence on the density and ceramic microstructure. Higher cobalt admixtures (above 1.0 mol%) in PFN eliminate pyrochlore phase formation, and at the same time they reduce maximum electric permittivity values. The ferroelectric to paraelectric phase transition in the modified PFN compositions undergoes diffusion.
W pracy otrzymano ceramikę typu PFN metodą jednoetapowej syntezy, modyfikowaną kobaltem w ilości: 1,0, 2,0, 3,0, 4,0 i 6,0% mol. Przeprowadzono badania wpływu domieszki kobaltu na strukturę krystaliczna, mikrostrukture i podstawowe właściwości ceramiki typu PFN. Wykazano, że izowalencyjne domieszkowanie PFN kobaltem wpływa pozytywnie na gęstość i mikrostrukturę ceramiki. Większe ilości domieszki kobaltu (pow. 1,0%mol) w PFN eliminują powstawanie fazy pirochlorowej, a jednocześnie zmniejszają wartości maksymalnej przenikalności elektrycznej. Przemiana fazowa z ferroelektrycznej do paraelektrycznej fazy, w modyfikowanych składach PFN, ulega rozmyciu.
Źródło:: Archives of Metallurgy and Materials; 2011, 56, 4; 1071-1071
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Introduction to n-body simulation of magnetorheological elastomer (MRE) microstructure forming process
Autorzy:: Miedzińska, D.
Łazowski, J.
Boczkowska, A.
Powiązania:: https://bibliotekanauki.pl/articles/246185.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: magnetorheological elastomer
n-body problem
magnetic interactions
smart materials
forming process
Opis:: Magnetorheological elastomers (MREs) are the materials with rheological properties which can be changed in a continuous way, rapidly and reversibly by the applied magnetic field. They are the solid analogues of magnetorheological fluids (MRFs), consisting of magnetically permeable particles (such as iron) added to a viscoelastic polymeric material prior to crosslinking. In the paper the introduction to the n-body simulation of the MRE microstructure forming process is presented. First, the basics of the n-body problem are presented as the planar three-body problem. It is well known, that the planar three-body problem is the problem describing the motion of three point masses in the plane under their mutual Newtonian gravitation. In the paper it is shown how that problem will be applied to the simulation of the phenomena that appeared when the external magnetic field is applied to the chaotically mixed iron particles in the liquid elastomer. Also the physical model of the interactions occurred in such structures are described. The assumptions shown in the paper will be then used for the development of the computer program which calculates the interactions between iron dipoles and describes the movement of the particles in the liquid elastomer under the magnetic field.
Źródło:: Journal of KONES; 2010, 17, 1; 249-253
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: Structural tests of freight wagons on the basis of signals generated by piezoelectric macro fiber composites
Autorzy:: Płaczek, M.
Wróbel, A.
Buchacz, A.
Powiązania:: https://bibliotekanauki.pl/articles/387033.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: dynamic response
freight wagon
piezoelectric transducers
smart materials
analysis of vibration
Opis:: Paper presents a report of a research work that concerns possibilities of freight wagons modernization using new composite materials. The main aim of presented work was to verify the possibility of inference from the dynamic response of the wagon about the changes in its technical condition. During the presented works tests on real objects were carried out using Macro Fiber Composite (MFC) piezoelectric transducers glued to the freight wagon’s frame. The dynamical response of the wagon was measured while the object was driving. On the next stage the measured signal was generated on a laboratory stand using electrodynamic modal shaker and vibrations of the laboratory model were measured. Measured signals were juxtaposed on charts and analysed. The aim of this work was to verify if it is possible to detect the change in the system using measurements of vibrations that are being generated during exploitation of the freight wagon.
Źródło:: Acta Mechanica et Automatica; 2017, 11, 3; 210-216
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Measurements of SMA properties using advanced optical methods
Zastosowanie zaawansowanych metod optycznych w pomiarach własności stopów z pamięcią kształtu
Autorzy:: Rączka, W.
Sioma, A.
Powiązania:: https://bibliotekanauki.pl/articles/368838.pdf
Data publikacji:: 2010
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: stopy z pamięcią kształtu
pomiary
metody optyczne
smart materials
measurement
optical methods
Opis:: Shape Memory Alloys are called smart or advanced materials because of their special features which are very useful in the latest solutions. Therefore, it is very important to gain a good knowledge of all these features for the purposes of modeling, describing, and ultimately controlling the behavior of these materials. This paper describes how to measure selected properties of SMA. It describes how to measure real temperature and diameter of thin SMA wires. At the end, we use a high speed camera to find out how an SMA wire breaks during stretching.
Stopy z pamięcią kształtu (Shape Memory Alloys - SMA) nazywane są zaawansowanymi materiałami ze względu na ich specjalne własności, które są chętnie stosowane w nowoczesnych rozwiązaniach technicznych. Identyfikacja ich w celu lepszego poznania, modelowania a także sterowania ich parametrami jest niezbędna we właściwym stosowaniu tych materiałów. W artykule opisano, jak zmierzyć rzeczywistą temperaturę i średnicę cienkiego drutu SMA z wykorzystaniem kamery termowizyjnej i mikrometru laserowego. Opisano również badania z użyciem kamery HSC zjawisk zachodzących w trakcie zerwania drutu SMA.
Źródło:: Mechanics and Control; 2010, 29, 1; 32-39
2083-6759
2300-7079
Pojawia się w:: Mechanics and Control
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Modelling coupled electric field and motion of beam of ionic polymer-metal composite
Autorzy:: Dominik, I.
Kaszuba, F.
Kwaśniewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/386510.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: ionic polymer-metal composite
mathematical model
smart materials
model matematyczny
inteligentne materiały
kompozyt
Opis:: In this paper, a mathematical model of electromechanical transduction of Ionic Polymer-Metal Composites is presented. The aim of the research was to create a physics-based, geometrically scalable model to use in control systems. The relation between actuating voltage and the tip displacement was described with a transfer function. The model is derived from the basic physical properties of re-searched materials. To calculate the final transfer function, two impedance models are considered – with and without neglecting the re-sistance of the metal electrodes. In this paper, the model with non-zero electrode resistance is calculated. Later, the model is simplified (taking the physical properties into account) and the numerical values based on the parameters of the samples are calculated. The simpli-fications allow the model to predict the response to low-frequency sine wave actuation. The frequency-domain characteristics of the sam-ples were created experimentally and compared to the model. The results have proven the accuracy of the model.
Źródło:: Acta Mechanica et Automatica; 2014, 8, 1; 38-43
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "smart materials" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język