Temat: aluminium foam - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Blast loading on aluminum foam microstructure
Autorzy:: Miedzińska, D.
Panowicz, R.
Powiązania:: https://bibliotekanauki.pl/articles/244041.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: microstructure
aluminium foam
strain rate effect
Opis:: One of the possible options as a material for protective layers is aluminum foams which become also very popular due to their lightweight and excellent plastic energy absorbing properties. Such characteristics have been appreciated by the automotive industry with continued research to further understand foam properties. Compressed foaming materials exhibit extensive plastic response, while the initial elastic region is limited in tension by a tensile brittle-failure stress. Aluminum foams have become also an attractive material as blast protective layers due to their desirable compressive properties. With different material engineering techniques (as, for example double-layer foam cladding) they can be customized to achieve the most desirable properties. Energy absorption capacity of foams microstructures under blast load was analytically confirmed based on a rigid-perfectly plastic-locking foam model Initial research indicates that energy absorbed by the cladding is much larger than that under quasi-static conditions due to strain rate effect. In this paper a numerical model of a closed cell aluminum foam idealistic microstructure was presented. The quasi static compression tests were carried out with the use of LS Dyna computer code. Then the sample was numerically loaded with the blast wavefrom detonation of explosives and its behavior was analyzed. The results ofboth analyses were compared.
Źródło:: Journal of KONES; 2010, 17, 3; 287-292
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Numerical and experimental study of real foam microstructure models
Autorzy:: Miedzińska, A.
Szymczyk, W.
Powiązania:: https://bibliotekanauki.pl/articles/246346.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: microstructure
aluminium foam
3D scanning
Opis:: Metal foams are new, as yet imperfectly characterized, class of materials with low densities and novel physical, mechanical, thermal, electrical and acoustic properties. They offer a potential for lightweight structures, for energy absorption, and for thermal management; and at least some of them are cheap. Such characteristics have been appreciated by the automotive industry in the aspect of crash and impact phenomenon. Energy absorption capacity of foams under dynamic load was analytically confirmed based on a rigid-perfectly plastic-locking foam model. In this paper the development process of a real closed cell foam microstructure based on finite element model with the use of SD scanning is shown. Computed tomography (CT) is a medical imaging method employing tomography created by computer processing. Digital geometry processing is used to generale a three-dimensional image of the inside of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. The numerical analyses carried out with the usage of LS Dyna computer code of the quasi static and dynamic compression tests are presented. The most important mechanisms and phenomena that appeared in the microstructural sample are described. In the final part of these investigations the comparison process between numerical and experimental test was performed. The results confirmed the good correspondence between both tests.
Źródło:: Journal of KONES; 2010, 17, 2; 309-314
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

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

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Compressive Crush Performance of Square Tubes Filled with Spheres of Closed-Cell Aluminum Foams
Autorzy:: Uzun, A.
Powiązania:: https://bibliotekanauki.pl/articles/351799.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: spheres of closed-cell aluminium foam
foam-filled tubes
compression behavior
energy absorption
Opis:: This paper describes the compressive crush behaviour of spheres of closed-cell aluminium foams with different diameters (6, 8 and 10 mm) and square tubes filled with these spheres. The spheres of closed-cell aluminium foams are net spherical shape fabricated via powder metallurgy methods by heating foamable precursor materials in a mould. The square tubes were filled by pouring the spheres of closed-cell aluminium foams freely (without any bonding). The compressive crush performance of square tubes filled with spheres of closed-cell aluminum foams were compared to that of the empty tubes. The results show a significant influence of the spheres of closed-cell aluminium foam on the average crushing load of the square tubes. The energy absorption in the square tube filled with spheres of closed-cell aluminium foam with diameters of 10 mm is higher than in the other square tubes. The spheres of closed-cell aluminium foams led to improvement of the energy absorption capacity of empty tubes.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 3; 1755-1760
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Experimental Study On Fracture Property Of Double Cantilever Beam Specimen With Aluminum Foam
Doświadczalne badanie pękania mimośrodowo rozciąganej próbki z bocznym karbem wykonanej z piany aluminiowej
Autorzy:: Kim, Y. C.
Choi, H. K.
Cho, J. U.
Powiązania:: https://bibliotekanauki.pl/articles/351465.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: aluminium foam
double cantilever beam
fracture energy
adhesively bonded structure
piana aluminiowa
podwójna belka wspornikowa
energia pękania
Opis:: This study aims to investigate double cantilever beam specimen with aluminum foam bonded by spray adhesive to investigate the fracture strength of the adhesive joint experimentally. The fracture energy at opening mode is calculated by the formulae of British Engineering Standard (BS 7991) and International Standard (ISO 11343). For the static experiment, four types of specimens with the heights (h) of 25 mm, 30 mm, 35 mm and 40 mm are manufactured and the experimental results are compared with each other. As the height becomes greater, the fracture energy becomes higher. After the length of crack reaches 150 mm, the fracture energy of the specimen (h=35 mm) is greater than that of the specimen (h=40 mm). Fatigue test is also performed with DCB test specimen. As the height decreases, the fracture energy becomes higher. By the result obtained from this study, aluminum foam with adhesive joint can be applied to actual composite structure and its fracture property can possibly be anticipated.
Źródło:: Archives of Metallurgy and Materials; 2015, 60, 2B; 1151-1154
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Neural Networks in Crashworthiness Analysis of Thin-Walled Profile with Foam Filling
Autorzy:: Rogala, Michał
Powiązania:: https://bibliotekanauki.pl/articles/103402.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: energy dissipation
thin-walled structure
aluminium foam
energy absorption
rozpraszanie energii
konstrukcja cienkościenna
pianka aluminiowa
pochłanianie energii
Opis:: This article presents the numerical tests of thin-walled compressed columns with a square cross-section. The crush efficiency indicators were determined using the finite element method (Abaqus) and neural networks of MLP. The models had a constant circular trigger, with a diameter of 32 mm. During dynamic analysis, the samples were loaded with 1700 J. The numerical models were filled with aluminum foam from 40 mm to 180 mm every 20 mm. The study presents the conclusions for the thin-walled models with crushable foam.
Źródło:: Advances in Science and Technology. Research Journal; 2020, 14, 3; 93-99
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Modelling and numerical simulation of the protectiye shield - protected plate - test stand system under blast shock wave
Autorzy:: Klasztorny, M.
Dziewulski, P.
Niezgoda, T.
Morka, A.
Powiązania:: https://bibliotekanauki.pl/articles/242616.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: light armoured vehicle
protective shield
aluminium-hybrid laminate-foam shield
blast shock wave
modelling and simulation
Opis:: The study presents FE modelling and simulation of a system for range testing of protective shields for light armoured vehicles. The protective shield designed by Authors is used against HE mines and IEDs up to 10 kg TNT. The system consists of the multiple-use portable rangę stand, a protected Armox 500T steel plate and a protective shield. The shield has a multi-layer structure and has the following main layers: PA11 aluminum, SCACS hybrid laminate, ALPORAS aluminum foam, SCACS hybrid laminate, connected together using SOUDASEAL chemo-set glue. The HE spherical charge is suspended centrally at 400 mm distance from the top surface of the stand. Overall dimensions of the test stand are approximately 800x800x180 mm, the protected piąte has dimensions 650x650x5 mm, and the protective shield is of 450x450x76 mm dimensions. The system is supported by an additional steel plate stiffening the subsoil. FE modelling, numerical simulations and processing the results were performed for the system under blast shock wave using the following CAE systems: CATIA, HyperMesh, LS-Dyna, and LS-PrePost. The 8-nodes brick finite elements were used, taking into account friction and contact phenomena. Isotropic and orthotropic material models and advanced nonlinear equations-of-state for some parts of the system were chosen, with relevant failure and erosion criteria, including the Johnson — Cook model for Armox 500T steel and PA11 aluminum and the MAT 161 model for plies of hybrid laminates. The shock wave was modelled approximately using the LOAD BLAST ENHANCED option available in LS-Dyna Version 971 R4 Beta code. Numerical simulations were performed for 2 kg TNT.
Źródło:: Journal of KONES; 2010, 17, 3; 197-204
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Nowoczesne materiały złożone na bazie stopów aluminium
Modern Materials Composed on the Base of Aluminium Alloys
Autorzy:: Grabian, J.
Powiązania:: https://bibliotekanauki.pl/articles/906583.pdf
Data publikacji:: 2005
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: stopy aluminium
metalowe materiały kompozytowe
piany metalowe
aluminium alloys
metal matrix composite
metallic foam
Opis:: Rozwój lotnictwa i technologii kosmicznych wymusił konieczność opracowania nowych, odpornych na podwyższone temperatury materiałów spełniających wymagania szczególnie w zakresie wysokiej wytrzymałości i niskiej gęstości. Materiałem spełniającym te wymagania okazały się metalowe kompozyty powstałe przez odpowiednie połączenie osnowy ze stopów aluminium lub magnezu i elementów zbrojących, najczęściej ceramicznych, w postaci włókien, cząstek lub whiskerów. Tak zbudowany złożony materiał charakteryzuje się zespołem właściwości niemożliwym do uzyskania w przypadku materiałów klasycznych. Podstawy teoretyczne obszaru badań dotyczących materiałów - inżynierii materiałowej - pozwalają na tworzenie materiałów kompozytowych o właści-wościach zgodnych z potrzebami konstruktora. Materiały te stały się dominującym czynnikiem postępu w szeroko pojętym transporcie, szczególnie lądowym i powietrznym, a także w medycynie, w produkcji sprzętu sportowego i rekreacyjnego itp. Metalowe materiały kompozytowe na bazie stopów aluminium znalazły szczególnie szerokie zastosowanie w produkcji elementów silników spalinowych, obudów skrzyń biegów, wałów napędowych, elementów zawieszenia i innych elementów konstrukcyjnych, przyczyniając się tym samym do obniżenia masy własnej pojazdów w transporcie lądowym, co skutkuje zmniejszeniem zużycia paliwa. Materiały te umożliwiły również wprowadzenie w silnikach spalinowych zmian konstrukcyjnych pozwalających na zmniejszenie emisji szkodliwych składników spalin. Materiałem, który powstał na bazie kompozytów aluminiowych zbrojonych cząstkami ceramicznymi są piany metalowe o niskiej gęstości. Materiał ten znajduje zastosowanie w przemyśle motoryzacyjnym jako wypełnienie struktur podlegających niszczeniu w strefie zgniotu, stając się, jako znakomity absorbent energii, istotnym czynnikiem pozwalającym konstruować bezpieczne środki transportu.
The development of aviation and space technologies has made it necessary to work out new materials, resistant to elevated temperatures, meeting requirements particularly in the range of high strength and low density. These requirements have been met by metal composites created by a suitable linking of the matrix of aluminium or magnesium alloys and reinforcing elements, mostly ceramic, in the form of fibres, particles or whiskers. Material thus composed is characterized by a set of properties difficult to attain in the case of classical materials. The theoretical bases of the research area material engineering - permit the creation of composite materials with properties conformed to the designer's needs. These materials have become the predominant factor of progress in transport widely conceived, particularly land and air transport, and also in m.edicine, in the production of sports and recreational equipment etc. Metal composite materials on the base of aluminium alloys have found particularly wide application in the production of diesel engines for the motor trade, gearbox casings, crankshafts. suspension elements and other construction elements, thus contributing to lowering the complete vehicle kerb weight. which results in the decrease of fuel consumption. These materials have also mad" It possible to introduce construction changes in diesel engines, permitting a decrease in the emission of harmful fuel exhaust components. Material that was created on the base of aluminium composites reinforced with ceramic particles, is metal foam of low density. It finds particular application in the motor industry, as the filling of structures subject to destruction in the crumple zone, becoming, as an excellent energy absorber, an essential factor in constructing safe cars .
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 7 (79); 23-32
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Effect of Zeolite Addition on the Production of a Cast Porous Composite Based on AC-AlSi11 Silumin
Autorzy:: Borowiecka-Jamrożek, J. M.
Kargul, M.
Powiązania:: https://bibliotekanauki.pl/articles/2203928.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metal matrix composites
casting
zeolite
syntactic foam
aluminium alloy
kompozyt z osnową metaliczną
odlew
zeolit
piana syntaktyczna
stop aluminium
Opis:: The paper presents the application of the casting method for the production of porous composites, called syntactic foams, of the casting alloy - solid particles type. This method was used to produce composites based on Al alloys reinforced with particles of clinoptilolite, a natural mineral from the zeolite group. Before the casting process, tests were carried out on the morphology, physicochemical properties and chemical composition of the zeolite, which was obtained from a rock called zeolite tuff, mined in a quarry in Kucin, (VSK PRO-ZEO s.r.o., Slovakia). Observations of the microstructure of the produced composites were also carried out using a scanning electron microscope. Diffractometric tests of zeolite rock as delivered for research and of the produced samples reinforced with zeolite particles were also carried out. Initial studies of the density and porosity of the produced composites were performed. The usefulness of the presented method of composite production was assessed on the basis of the conducted structural tests, with particular emphasis on the particle distribution in the alloy matrix.
Źródło:: Archives of Foundry Engineering; 2022, 22, 4; 96--101
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Influence of Sand Fluidization on Structure and Properties of Aluminum Lost Foam Casting
Autorzy:: Kaliuzhnyi, P.
Powiązania:: https://bibliotekanauki.pl/articles/380477.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative foundry technologies
lost foam casting
aluminum alloy
sand fluidization
innowacyjne technologie odlewnicze
metoda traconej piany
stop aluminium
fluidyzacja
Opis:: The article presents investigation results of the effect of sand fluidization on the structure and mechanical properties of AlSi9 aluminum alloy. Castings were made by lost foam casting process with sand fluidization in mold at the stages of their solidification and cooling. Sand fluidization was achieved by blowing sand bed with compressed air in a foundry container. The metallographic study was carrying out on samples cut from different sections of the castings. Mechanical properties were determined on specimens made from cast samples. Microstructural analysis showed that sand fluidization increases the cooling rate, as a result, the main microstructural components of the alloy – SDAS, eutectic silicon and needles of the rich-iron phase – decrease. Moreover, in different sections of the casting structure is more uniform. With an increasing the air flow rate, a greater refinement of the structure is observed. Through the use of sand fluidization, the mechanical properties of LFC aluminum alloys increase to the level of gravity die castings.
Źródło:: Archives of Foundry Engineering; 2020, 20, 1; 122-126
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Feeding and Cooling and Time of Thermal Treatment of a Massive Bush Made of the Complex Aluminum Bronze Cast by the Lost Foam
Autorzy:: Just, P.
Pisarek, B. P.
Powiązania:: https://bibliotekanauki.pl/articles/380931.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: innovative materials
innovative casting technologies
lost foam
aluminium bronze
casting properties
riser head
steel internal chill
thermal treatment
nowoczesne materiały
innowacyjne technologie odlewnicze
właściwości odlewów
obróbka termiczna
Opis:: Small additions of Cr, Mo and W to aluminium-iron-nickel bronze are mostly located in phases &kappa i (i=II; III; IV),and next in phase &alpha (in the matrix) and phase γ2. They raise the temperature of the phase transformations in aluminium bronzes as well as the casts’ abrasive and adhesive wear resistance. The paper presents a selection of feeding elements and thermal treatment times which guarantees structure stability, for a cast of a massive bush working at an elevated temperature (650–750°C) made by means of the lost foam technology out of composite aluminium bronze. So far, there have been no analyses of the phenomena characteristic to the examined bronze which accompany the process of its solidification during gasification of the EPS pattern. There are also no guidelines for designing risers and steel internal chill for casts made of this bronze. The work identifies the type and location of the existing defects in the mould’s cast. It also proposes a solution to the manner of its feeding and cooling which compensates the significant volume contraction of bronze and effectively removes the formed gases from the area of mould solidification. Another important aspect of the performed research was establishing the duration time of bronze annealing at the temperature of 750°C which guarantees stabilization of the changes in the bronze microstructure – stabilization of the changes in the bronze HB hardness.
Źródło:: Archives of Foundry Engineering; 2014, 14, 4; 39-44
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "aluminium foam" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język