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Tytuł:
Aluminium foam testing for impact energy absorption aims
Autorzy:
Niezgoda, T.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/245628.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
aluminium foam
microstructure modelling
open cell foam
closed cell foam
Opis:
Aluminium foams are a new group of materials used for impact energy absorbing elements. They are light (typically 10-25% of the density of the metal they are made of) and stiff, and are frequently proposed as a light weight structural material. That is why they often are applied in automotive and transport industry solutions, for example as parts of bumpers. The methods of numerical modelling for open and closed cell aluminium foams are presented in the paper as well as closed and open cellfoam microstructure model. The numerical models of foam ideal microstructures created with shell finite elements are shown. The models were developed on the basis of Kefain tetrakaidecahedrons - structures consisting of six squares and eight hexagons. In the case of closed cell foams, the polyhedron with full walls was adopted. In the case of open cell foams the circle wholes were removed from polyhedron surfaces. Then the numerical analysis of a created models compressive test was carried out with the usage of LS Dyna computer code. The nonlinear procedures were applied. The results were analyzed in the scope of energy absorbing properties of aluminium foams.
Źródło:
Journal of KONES; 2009, 16, 3; 283-289
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efektywność substytucji pracy ludzkiej kapitałem w wysokotowarowych gospodarstwach rolnych
Efficiency of capital for human labour substitution in the large scale production farms
Autorzy:
Niezgoda, D.
Powiązania:
https://bibliotekanauki.pl/articles/866792.pdf
Data publikacji:
2009
Wydawca:
The Polish Association of Agricultural and Agribusiness Economists
Tematy:
gospodarstwa rolne
praca
kapital
substytucja pracy
rentownosc
wskazniki rentownosci
gospodarstwa towarowe
Opis:
Po oszacowaniu funkcji dochodowej, przy przyjęciu jako zmiennych niezależnych ziemi, pracy i kapitału, a następnie dokonaniu jej przekształceń, ustalono rentowność wybranych technik wytwarzania oraz wyliczono krańcowe stopy substytucji pracy kapitałem.
The objective of the paper was to evaluate the profitability of capital for labour substitution in farms of size 407100 ESU and farms of size 7100 ESU. The Cobb-Douglas function was used in the research to analyze the competitiveness of production factors. The results of conducted analysis proved that the estimated profitability of production methods in the average farm of size 407100 ESU was lower than the profitability of farms of size 7100 ESU. The main reason for heterogeneity of production methods profitability was the different level of marginal rate of substitution. In light of the present circumstances, capital for labour substitution leads to the growth offarms' income. The higher level of farm’s income, the better conditions for self- financing of its growth.
Źródło:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2009, 11, 1
1508-3535
2450-7296
Pojawia się w:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zroznicowane dochody w gospodarstwach rolnych oraz jego przyczyny
Income differentiation in agricultural holdings and reasons for such differentiation
Autorzy:
Niezgoda, D
Powiązania:
https://bibliotekanauki.pl/articles/879491.pdf
Data publikacji:
2009
Wydawca:
Instytut Ekonomiki Rolnictwa i Gospodarki Żywnościowej - Państwowy Instytut Badawczy
Tematy:
gospodarstwa rolne
dochody
konkurencyjnosc
zroznicowanie dochodowe
elastycznosc dochodowa
podzial dochodu
dochodowosc koncowa
czynniki produkcji
wartosc dodana
Opis:
The analysis of income capacity of farms and factors of production serves the improvement of the rationality of economics in agriculture, and thus contributes to the evolutionary change of its entity-related structure while maintaining the balance between the criteria of social justice and economical management. Making use of income-related function specified for holdings classified into six classes (by the level of ESU), it was determined that the main barrier for a farm to move from lower to higher ESU class is the high diversification of border income of basic production factors. The main reason for such differentiation of income level is the labour factor. Increase in labour efficiency contributes to the improvement of economic effectiveness of farms, but also results in the decrease of the number of jobs in agriculture, which confirms – to some extent – the gap between the individual interest of the owner against the social interest. An economic borderline should be set between a farm and an agricultural holding. Covering farms with state intervention is advisable in order to ensure the implementation of social objectives in a wider perspective.
Źródło:
Zagadnienia Ekonomiki Rolnej; 2009, 1; 24-37
0044-1600
2392-3458
Pojawia się w:
Zagadnienia Ekonomiki Rolnej
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Tytuł:
Prof. dr hab. Mieczysław Adamowicz - samorealizacja poprzez przedsiębiorczość intelektualną
Autorzy:
Niezgoda, D.
Powiązania:
https://bibliotekanauki.pl/articles/879286.pdf
Data publikacji:
2010
Wydawca:
Instytut Ekonomiki Rolnictwa i Gospodarki Żywnościowej - Państwowy Instytut Badawczy
Źródło:
Zagadnienia Ekonomiki Rolnej; 2010, 4
0044-1600
2392-3458
Pojawia się w:
Zagadnienia Ekonomiki Rolnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Various approaches to magnetorheological elastomers structures FE modelling
Autorzy:
Miedzińska, D.
Niezgoda, T.
Boczkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/245985.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
magnetorheological elastomer
FE modelling
multistage modelling
microscale
macro scale
Opis:
Magnetorheological elastomers (MREs) are the materials with rheological properties which can be rapidly and reversibly changed in a continuous way 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 different approaches to numerical modelling of the magnetorheological elastomers (MREs) structures are presented. The methods of the MRE micro- and macrostructural FE simulations are taken into consideration. The first approach is connected with the microstructural behaviour of the iron particles situated in the pure elastomer and subjected to the mechanical or magnetic load. The second approach is related to global material properties consideration and macrostructural behaviour modelling. The paper shows that there are many ways of such new materials structure behaviour modelling. All the FE analyses always need to be verified with the experiments as well as for macro- and micro scale material reactions, properties and phenomena describing.
Źródło:
Journal of KONES; 2010, 17, 1; 255-260
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical calculations of RVE dimensions for two-phase material
Autorzy:
Miedzińska, D.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/242298.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
microstructure
two-phase material
metal-ceramic composite
RVE
Opis:
A representative volume element (RVE) is a statistical representation of typical material properties. It should contain enough information on the microstructure thereby be sufficiently smaller than the macroscopic structural dimensions. The paper deals with the numerical calculations of the dimensions of the RVE for a two-phase material microstructure. Two and three dimensional models are taken into consideration. The structure of the samples are developed on the base of randomization of elements belonging to one of the phases. The phases volume share is 50/50%. The following series of the models are analyzed: from 10 x 10 to 100 x 100 elements for 2D samples and from 10 x 10 x 10 to 100 x 100 x 100 elements for 3D samples. The element characteristic dimension is 10 jm. The elastic behavior of the base materials (magnesium and alumina) is taken into account. The quasi-static compression tests of the developed structures are carried out with the use of LS-DYNA computer code. The results are presented as the equivalent Young modulus values and compared to the calculations based on the rule of mixtures. The stabilization of the achieved results allows to assess the dimensions of the RVE for two-phase material with random distribution.
Źródło:
Journal of KONES; 2011, 18, 2; 303-310
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pianki poliuretanowe - właściwości, zastosowania, recykling
Poliurethane foams - properties, applications, recycling
Autorzy:
Barnat, W.
Miedzińska, D.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/357306.pdf
Data publikacji:
2011
Wydawca:
Politechnika Śląska
Tematy:
pianka poliuretanowa
tworzywa sztuczne
recykling
pouliurethane foam
polymers
recycling
Opis:
Pianka poliuretanowa jest tworzywem sztucznym składającym się z komórek litego poliuretanu, który otacza pęcherzyki gazu. Materiał ten może być sztywny lub podatny na odkształcenia, ale zawsze charakteryzuje się niską gęstością. Pianki najczęściej są produkowane w formie dużych bloków, które ucina się do pożądanych kształtów. Po zakończeniu okresu użytkowania poliuretany mogą być odzyskiwane w celu ponownego użycia lub poddawane recyklingowi chemicznemu. W artykule przedstawione zostały wybrane problemy związane z badaniem, zastosowaniem i w dalszej kolejności recyklingiem pian polimerowych.
Polyurethane foam refers to a number of different types of foam consisting of polymers made of molecular chains bound together by urethane links. It can be flexible or rigid, but has a low density. Flexible polyurethane is made in blocks and then cut to its desired shape. At the end of their service life, polyurethanes can be sent for reuse (for example, rebonding) or chemical recycling, or can be incinerated for energy recovery. The chosen problems connected with research, implementations and recycling of polyurethane foams were presented.
Źródło:
Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2011, 13, 4; 13-17
1733-4381
Pojawia się w:
Archiwum Gospodarki Odpadami i Ochrony Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New method of carbon dioxide underground storage coupled with shale gas recovery
Autorzy:
Niezgoda, T.
Miedzińska, D.
Kędzierski, P.
Powiązania:
https://bibliotekanauki.pl/articles/246774.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
shale gas
carbon dioxide
storage system
Opis:
Shale gas is natural gas produced from shale, a type of sedimentary rock. Shale gas has become an increasingly important source of natural gas in the United States over the past decade, and interest has spread to potential gas shales in Canada, Europe, Asia, and Australia. One analyst expects shale gas to supply as much as half the natural gas production in North America by 2020. As of 2010, Poland imports two-thirds of its natural gas from Russia. ConocoPhillips has announced plans to explore for shale gas in Poland, along with Lane energy. The recently made available US Department of Energy report revealed that the largest reserves of shale gas in Europe are in Poland. The authors of the report calculate that Poland has reserves of about 22.45 trillion cubic meters of shale gas, of which 5.30 trillion cubic meters is immediately available for extracting. The most common method of shale gas recovery is hydraulic fracturing - the propagation of fractures in a rock layer caused by the presence of a pressurized fluid. Hydraulic fractures form naturally, as in the case of veins or dikes, and is one means by which gas and petroleum from source rocks may migrate to reservoir rocks. This process is used to release petroleum, natural gas (including shale gas, tight gas and coal seam gas), or other substances for extraction, via a technique called induced hydraulic fracturing. The method is critically assessed by ecologists. The paper deals with new method of gas shale fracturing and gas recovery coupled with carbon dioxide storage. It allows to effectively mine the shale gas and to store carbon dioxide in shale rock. It must be noticed that CO2 pollution is a very important problem in Poland, because of European Union CO2 limits. Also the numerical calculation of carbon dioxide thermodynamical process of decompression process, which simulates the injection of the cold liquid gas into the shale formation (high temperature and pressure conditions) and its influence on shale rock fracturing will be presented.
Źródło:
Journal of KONES; 2012, 19, 3; 327-333
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation studies of the simplified model of the missile with cumulative head
Autorzy:
Sybilski, K.
Panowicz, R.
Kołodziejczyk, D.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/246839.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
RPG
simulation
FEM analysis
safety
slat armour
rod armour
Opis:
During ongoing conflicts around the world, some of the most dangerous threats are rocket-propelled grenades. They are light, easy to use and cheap, and their penetration reaches 900 mm of armoured RHA steel. Therefore, in many experimental and numerical laboratories there are researches of different, in aspect of shape, dimensions and used material, types of rod armours protecting against such a threat carried out. This kind of research must be confirmed in the last part of design by appropriate field tests. However, at the beginning of the design process, it is important to find a fast method of testing the developed solutions in a manner, which allows us to observe and measure as many process parameters as possible. One of such tests is research with the use of simplified models built in an appropriate scale. Small dimensions and simple construction result in the fact that the cost of manufacturing of models is much lower, and time is shorter. Tests on the simplified models are also possible to be carried out in laboratory conditions, what reduces the costs and makes the measurements of physical properties easier. The article describes experimental investigations of the impact of a simplified missile with a shape charge jet head model into a thick plate and steel rods. The construction of a missile, the used equipment and apparatus as well as the proceedings of the experiment are presented. The paper provides information about the structure of FE model and both initial and boundary conditions of the examined system. The results of numerical analysis are presented and compared with the results from experimental tests.
Źródło:
Journal of KONES; 2012, 19, 3; 415-420
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of coal structure in the aspect of gas content
Autorzy:
Niezgoda, T.
Miedzińska, D.
Małek, E.
Powiązania:
https://bibliotekanauki.pl/articles/298731.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
carbon dioxide
methane
porosity of coal
Opis:
The problem of methane existence in coal beds has been known for many years. It was and still is a danger to coalminers. The aim of the research presented in the paper is to show and assess the porosity structure (especially micro and nanoporosity) in accordance to the dimensions of carbon dioxide particle. The characteristic surface morphology of the sample and the disclosure of carbon porous structure was obtain using the scanning electron microscope (SEM). The presented study of the coal microstructure is a part of the coal demethanation method with the use of liquid CO2, that was proposed by Military University of Technology. Based on the results of laboratory tests may be noted that the analyzed coal has a granular structure. It is also visible that that the structure is stratified, and there is a lot of cracks and free space between grains, which can accumulated methane in coal structure. The nanoporosity of the coal grains was observed during SEM study. The sizes and shapes of pores are miscellaneous. However the dimension of 62-300 nm allow to draw a conclusion, that the nanopores can contain a few particles of CH4 (4 A), which can be released by the CO2 particle (2.54 A). Finally, on the base of presented research it can be concluded that the method of coal demethanation with the use of CO2 can be economically and ecologically effective, and can increase the miners safety.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 169-179
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon dioxide geosequestration method coupled with shale gas recovery
Autorzy:
Niezgoda, T.
Małek, E.
Miedzińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/298651.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
shale gas
carbon dioxide
geosequestration
Opis:
Shale gas in the United States over the past decade, and interest has spread to potential gas shales in Canada, Europe, Asia, and Australia. One analyst expects shale gas to supply as much as half the natural gas production in North America by 2020. Carbon dioxide capture and storage (CCS) is a set of technologies for the capture of CO2 from its anthropogenic point sources, its transport to a storage location, and its geosequestration. This is only one, though very important, option in a portfolio of actions to fight the increase of atmospheric CO2 concentration and to mitigate climate change, while at the same time allowing for the continued use of fossil fuels. Deployment of CCS technologies is expected to be limited in the next 5-10 years, but to contribute significantly to the reduction of CO2 emissions 20 years from now. Capture of CO2 using existing separation techniques can be applied to large point sources, i.e. power plants or industrial plants; CO2 can be easily transported over large distances using pipelines and ships; finally CO2 can be permanently stored in suitable deep geological formations, namely deep saline aquifers, oil or gas reservoirs, and unmineable coal seams, or it can be fixed in carbonates. The paper deals with the innovative method of carbon dioxide storage coupled with gas shale fracturing and methane recovery developed in the Military University of Technology. It allows to effectively mine the shale gas and to store carbon dioxide in shale rock. It must be noticed that CO2 pollution is a very important problem in Poland, because of European Union CO2 limits. Also carbon dioxide thermodynamic process of decompression numerical calculation, which simulates the injection of the cold liquid gas into the shale formation (high temperature and pressure conditions) and its influence on shale rock fracturing as well as initial experimental verification of the method was presented in the paper.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 161-167
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on carbon dioxide thermodynamic behavior for the purpose of shale rock fracturing
Autorzy:
Niezgoda, T.
Miedzińska, D.
Małek, E.
Kędzierski, P.
Sławiński, G.
Powiązania:
https://bibliotekanauki.pl/articles/201878.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbon dioxide
shale gas
storage system
thermodynamics
FEM
Opis:
The possibility of using CO2 to fracturing a shale rock has been presented in the paper. The described innovative method which allows for the efficient extraction of shale gas and carbon dioxide storage in a shale rock was developed in Department of Mechanics and Applied Computer Science at the Military University of Technology, Warsaw, Poland. Firstly, the method was verified on the base of analytical and experimental research. In the next stage of the method verification carbon dioxide thermodynamic behavior was studied. The growth in pressure of drop of CO2 heated in a closed volume was numerically tested. The research confirmed the efficiency of the use of carbon dioxide as a medium for fracturing of rocks. The usage of liquid CO2 can be alternative for hydraulic fracturing and is safe for the environment.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 3; 605-612
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on coal microstructure for porosity levels assessment
Autorzy:
Miedzińska, D.
Niezgoda, T.
Małek, E.
Zasada, D.
Powiązania:
https://bibliotekanauki.pl/articles/201272.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
coal
methane
carbon dioxide
coalbed methane
Opis:
The problem of methane existence in coal beds has been known for many years. It was and still it is a danger to coalminers. The aim of the research, presented in the paper, is to show and assess the porosity structure (especially micro and nanoporosity) in accordance to the dimensions of carbon dioxide particle. The characteristic surface morphology of the sample and the disclosure of the carbon porous structure have been obtained using the scanning electron microscope (SEM). The presented study of the coal microstructure is a part of the coal demethanation method with the use of liquid CO2, that has been proposed by the Military University of Technology.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 2; 499-505
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza procesu przebijania płyty przez małogabarytowy element cylindryczny
Analysis of Process of Plate Piercing by Small Dimension Cylindrical Element
Autorzy:
Panowicz, R.
Kołodziejczyk, D.
Sybilski, K.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/403921.pdf
Data publikacji:
2014
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
przebijalność
analiza numeryczna
dynamika
metoda elementów skończonych
piercing power
numerical analysis
dynamics
finite element method
Opis:
W artykule przedstawiono wstępną weryfikację oddziaływania małogabarytowego elementu cylindrycznego z przeszkodą w postaci tarczy metalowej o grubości 2,5 mm. Rozważono uderzenia z różnymi prędkościami (200, 400 i 800 m/s) oraz kątami uderzenia (30, 45, 60 i 90°), dla dwóch rodzajów materiałów: stopu aluminium PA7 oraz taśmy miedzianej. Na podstawie tych wyników określono obszar zmian, które powstały w materiale na skutek uderzenia. Trójwymiarowy model numeryczny został wykonany w systemie HyperMesh [1], a do analiz zjawisk szybkozmiennych użyto nieliniowej metody elementów skończonych zaimplementowanej w programie LS-Dyna [2]. Wykorzystanie analiz numerycznych umożliwiło śledzenie niemożliwych do zarejestrowania metodami eksperymentalnymi, rozważanych w poniższej pracy, zjawisk dynamicznych. Wykorzystując oprogramowanie LS-Dyna, można było obserwować propagację zniszczenia w kolejnych krokach czasowych, jak również rozkład naprężeń w materiale. Przeprowadzone w pracy badania pozwoliły na dokładniejsze poznanie fizyki zjawiska procesu przebijania.
The article presents an initial verification of interaction of a small dimension cylindrical element with an obstacle in the form of a 2.5 mm thick metal shield. There were considered impacts at different velocities (200 , 400 and 800 m/s) and different impact angles (30, 45, 60 and 90°) for two different types of materials: aluminium alloy PA7 and copper tape. Based on these results, there was determined the area of changes which were formed in the material as a result of the impact. A three-dimensional numerical model was developed in HyperMesh system [1] and analyses of high frequency phenomena were performed with the use of a nonlinear finite element method included in LD-Dyna software [2]. Implementation of numerical analyses would enable the investigation of the considered in the present work dynamic phenomena impossible to be recorded with experimental methods. Application of LS-Dyna enabled both the investigation of damages propagation in the subsequent time steps and stress distribution in the material. The tests carried out in the present work allowed more accurate knowledge of physics of a piercing process phenomenon.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2014, 5, 2 (16); 77-90
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 30

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