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Wyszukujesz frazę "Hanusová, Patrícia" wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
Carbon fiber polymer composites
Autorzy:
Markovičová, Lenka
Zatkalíková, Viera
Hanusová, Patrícia
Powiązania:
https://bibliotekanauki.pl/articles/104047.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
carbon fibers
polymer matrix
composites
mechanical properties
włókna węglowe
matryca polimerowa
kompozyty
właściwości mechaniczne
Opis:
Carbon fiber reinforced composite materials offer greater rigidity and strength than any other composites, but are much more expensive than e.g. glass fiber reinforced composite materials. Continuous fibers in polyester give the best properties. The fibers carry mechanical loads, the matrix transfers the loads to the fibers, is ductile and tough, protect the fibers from handling and environmental damage. The working temperature and the processing conditions of the composite depend on the matrix material. Polyesters are the most commonly used matrices because they offer good properties at relatively low cost. The strength of the composite increases along with the fiber-matrix ratio and the fiber orientation parallel to the load direction. The longer the fibers, the more effective the load transfer is. Increasing the thickness of the laminate leads to a reduction in the strength of the composite and the modulus of strength, since the likelihood of the presence of defects increases. The aim of this research is to analyze the change in the mechanical properties of the polymer composite. The polymer composite consists of carbon fibers and epoxy resin. The change in compressive strength in the longitudinal and transverse directions of the fiber orientation was evaluated. At the same time, the influence of the wet environment on the change of mechanical properties of the composite was evaluated.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 276-280
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local corrosion of AISI 304 stainless steel in acidic chloride solution
Autorzy:
Zatkalíková, Viera
Markovičová, Lenka
Hanusová, Patrícia
Powiązania:
https://bibliotekanauki.pl/articles/104041.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
austenitic stainless steel
pitting corrosion
exposure test
cyclic potentiodynamic test
direction of rolling
austenityczna stal nierdzewna
korozja wżerowa
próba narażenia
cykliczna próba potencjodynamiczna
kierunek walcowania
Opis:
AISI 304 austenitic stainless steel is recommended and used for various applications in industry, architecture and medicine. Presence of halides in environment evokes a possibility of the local corrosion which limits seriously exploitation of this material in aggressive conditions. The presented paper is focused on the pitting corrosion resistance (“as received” steel surface) in 1M chloride solution (pH=1.2) at a common (20 °C) and an elevated (50 °C) ambient temperatures. 24-hours exposure immersion test (ASTM G48) and cyclic potentiodynamic test (ASTM G61) are used as the independent test methods. The exposure immersion test is carried out with cross-rolled and longitudinally rolled specimens and the effect of direction of rolling on the resistance to pitting is studied.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 268-275
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiaxial fatigue experimental analysis of 6063-T66 aluminum alloy of the base material and the welded material
Autorzy:
Uhríčik, Milan
Kopas, Peter
Palček, Peter
Oršulová, Tatiana
Hanusová, Patrícia
Powiązania:
https://bibliotekanauki.pl/articles/103995.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
multiaxial fatigue
aluminum alloy
fatigue criteria
welding
cyclic loading
zmęczenie wieloosiowe
stop aluminium
kryteria zmęczeniowe
spawanie
obciążenie cykliczne
Opis:
This article deals with determining of fatigue lifetime of aluminum alloy 6063-T66 during by multiaxial cyclic loading. The experiments deal with the testing of specimens for identification of the strain-life behavior of material, the modeling of combined loading and determining the number of cycles to fracture in the region of low-cycle fatigue. Fatigue tests under constant amplitude loading were performed in a standard electromechanical machine with a suitable gripping system. Based on the experimental results the fatigue design curves are compared to the fatigue data from the base material and the welded material and also multiaxial fatigue models, which are able to predict fatigue life at different loads.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 334-341
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The quality assurance of cast and wrought aero jet engine components made from Ni-base superalloys with using of quantitative metallography methods and alloys lifetime prediction
Autorzy:
Belan, Juraj
Kuchariková, Lenka
Mazur, Magdalena
Tillová, Eva
Hanusová, Patrícia
Powiązania:
https://bibliotekanauki.pl/articles/104037.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
quality assurance
cast Ni-base superalloys
wrought Ni-base superalloys
turbine blades
turbine disc
quantitative metallography
zapewnienie jakości
superstopy na bazie Ni
łopatki turbin
tarcza turbiny
metalografia ilościowa
Opis:
The Ni-base superalloys are used in the aircraft industry for the production of aero engine most stressed parts, turbine blades or turbine discs. Quality of aero jet engine components has a significant influence on the overall lifetime of a jet engine as itself as well as the whole airplane. From this reason a dendrite arm spacing, grain size, morphology, number and value of γ' - phase are very important structural characteristics for blade or discs lifetime prediction. The methods of quantitative metallography are very often used for evaluation of structural characteristics mentioned above. The high-temperature effect on structural characteristics and application of quantitative methods evaluation are presented in this paper. The two different groups of Ni-base alloys have been used as experimental material: cast alloys ZhS6K and IN713LC, which are used for small turbine blades production and wrought alloys EI 698VD and EI 929, which are used for turbine disc production. Selected alloys have been evaluated in the starting stage and after applied heattreatment at 850°C for 24 hrs. This applied heat-treatment causes structural changes in all alloys groups. In cast alloy dendritic structure is degraded and gamma prime average size has grown what has a negative influence on turbine blade creep rupture life. Wrought alloys show partially grain boundary melting and grain size changed due to recrystallization what causes mechanical properties decreasing - ultimate tensile strength mainly.
Źródło:
Quality Production Improvement - QPI; 2019, 1, 1; 222-229
2657-8603
Pojawia się w:
Quality Production Improvement - QPI
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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