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Wyszukujesz frazę "durability test" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
A small-size stand for vibroacoustic and durability testing of rolling bearings
Autorzy:
Wróbel, M.
Barczewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/127755.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
vibroacoustics
rolling bearings
durability test
testing stand
wibroakustyka
łożyska toczne
badanie trwałości
stanowisko badawcze
Opis:
A small-size stand for vibroacoustic and durability testing of rolling bearings is presented in this paper. Main purposes and motivations for building this stand were not only to assist research and development works but also to familiarize students with techniques and methods of rolling bearings diagnosing as well as to improve their skills of assessment of rolling bearings technical condition. The project assumptions of the stand, mechanical construction and architecture of data acquisition and analysis system (hardware and software) are described in this paper. Finally there are conclusions about stand’s capabilities included.
Źródło:
Vibrations in Physical Systems; 2017, 28; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Team durability test of a 1.3 MW locomotive diesel engine with prototype piston rings
Autorzy:
Kaźmierczak, Andrzej
Tkaczyk, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2097584.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
combustion engine
durability test
piston ring
diamond powder
multilayer
silnik spalinowy
badanie trwałości
pierścień tłokowy
proszek diamentowy
wielowarstwa
Opis:
Objective of this work was to realize a test of durability of railway engine EMD645 with power about 1300 kW. Within the framework of this test were investigated a prototyped piston’s rings with diamond embankment. Piston rings are made of chromium layer with including of diamond powders technology with a porous chromium coating, where in pores is deposited on said diamond powder with a grain size about 1 micron. The work will be carried out of an analysis of collaboration piston-piston rings-cylinder unit in internal combustion engine and an analysis of the use of hard materials (diamond powder) in friction pairs. During work of this unit we can observe wear of piston rings, precisely - of coating which is deposited on ring to prolong service life. After testing of the locomotive engine EMD645 on the basis of the collected results are developed conclusions of the wearing intensity on piston ring and relating them to the requirements for coatings. The work aims to show the possibilities and benefits of the application of new protective coatings on structural elements of the internal combustion engine in order to reduce their wearing, which is consistent with the observed trend of technology development.
Źródło:
Combustion Engines; 2021, 60, 4; 77--82
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A study of the durability of concrete reinforced with hemp fibers exposed to external Sulfatic attack
Autorzy:
Ziane, Sami
Khelifa, Mohammed-Rissel
Mezhoud, Samy
Powiązania:
https://bibliotekanauki.pl/articles/1838089.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
reinforced concrete
hemp fibers
polypropylene fibre
mechanical performance
test durability
sulfatic attacks
beton zbrojony
włókna konopne
włókna polipropylenowe
właściwości mechaniczne
badanie trwałości
siarczany
Opis:
The purpose of this paper is to study the durability of concrete reinforced with hemp fibers in the face of external Sulfatic attack. For this purpose, five types of concrete were formulated; three types of concrete reinforced with hemp fibers (HC-0.25, HC-0.5, and HC-1) at 0.25%, 0.5%, and 1 % of hemp fibers in volume, respectively. And two control concretes, being ordinary concrete (OC) and polypropylene fiber reinforced concrete (PC). To assess the sulfatic attacks, the described concrete types underwent two aging protocols: 1) a complete immersion in 12.5 % Sodium Sulfate (Na2SO4) solution, and 2) an accelerated aging protocol consisting of immersion/drying in the same sulfate solution at a temperature of 60°C. The results show that concrete reinforced with 0.25 % of hemp fibers is the optimal amount compared to control concretes in terms of physico-mechanical performance and durability under sulfate attack. This number of fibers could enable the production of green and durable structural concretes based on untreated hemp fibers.
Źródło:
Civil and Environmental Engineering Reports; 2020, 30, 2; 158-180
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Durability assessment of monolithic rammed earth walls
Ocena trwałości murów monolitycznych z ziemi ubijanej
Autorzy:
Narloch, P. L.
Woyciechowski, P.
Dmowska, E.
Halemba, K.
Powiązania:
https://bibliotekanauki.pl/articles/230364.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ziemia ubijana
ściana monolityczna
test erozji
trwałość
ocena trwałości
rammed earth
monolithic wall
erosion test
durability
durability assessment
Opis:
One of the main threats to constructions made from rammed earth is destruction due to exposure to water. The way to limit this dangerous phenomenon is to supplement the local soil mixtures with stabilizing agents. The main component used is Portland cement. This article analyses the results of research which focused on the resistance of rammed earth to water erosion. Because of the lack of national standards regarding the method of examining the durability of rammed earth, the research was based on the New Zealand standard NZS 4298: 1998. The results confirm the possibility of using rammed earth stabilized by cement in a temperate climate.
Jednym z głównych zagrożeń dla konstrukcji wykonywanych w technologii ziemi ubijanej jest destrukcja pod wpływem wody. Sposobem na ograniczenie tego niebezpiecznego zjawiska jest uzupełnienie mieszanki lokalnie dostępnych gruntów o składniki stabilizujące. Najczęściej stosowanym składnikiem jest cement portlandzki. W niniejszym artykule przeanalizowano wyniki badań odporności ziemi ubijanej na erozję wodną. Ze względu na brak krajowych norm dotyczących sposobu badania trwałości ziemi ubijanej, badania zostały wykonane w oparciu o normę nowozelandzką NZS 4298: 1998. Uzyskane wyniki pozytywnie weryfikują możliwość stonowania ziemi ubijanej stabilizowanej cementem w klimacie umiarkowanym.
Źródło:
Archives of Civil Engineering; 2015, 61, 2; 73-88
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Durability of Dimensionally Stable Electrode in High-Rate Electroplating Process Condition Using Accelerated Life Test
Autorzy:
Park, Sung Cheol
Jung, Yeon Jae
Koo, Seokbon
Lee, Kee-Ahn
Son, Seong Ho
Powiązania:
https://bibliotekanauki.pl/articles/2049186.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
durability
prediction
dimensionally stable electrode
accelerated life test
failure mechanism
Opis:
In order to the long-term stability of DSE for electroplating process, the lifetime equations were calculated from the results of the accelerated life testing, and the lifetime of DSE was predicted. The nano-embossing pre-treatment led to 2.65 times in the lifetime of DSE. The degradation mechanism of DSE with a thick metal oxide layer for applied highly current density process condition was identified. The improvement of durability of DSE seems to be closely related to adhesion between titanium plate and mixed metal oxide layer.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 675-678
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The stand for resource tests of drive lines the close circuit
Stend dlja resursnykh ispytanijj kardannykh peredach v zamknutom konture
Autorzy:
Pastukhov, A.
Powiązania:
https://bibliotekanauki.pl/articles/76459.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
resource test
drive line
closed circuit
tooth gearing
durability
technical solution
rational design
modern system
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 7
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friction Stir Welding of Ultrathin AA2024-T3 Aluminum Sheets Using Ceramic Tool
Autorzy:
Myśliwiec, P.
Śliwa, R. E.
Ostrowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/355870.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir welding
aluminum alloys
ceramic tools
FSW force measurements
low-cycle fatigue test
FSW joint durability
Opis:
The paper presents the results of research work on linear FSW (Friction Stir Welding) joining aluminum alloys AA2024-T3 of 0.5 mm in thickness. The study was conducted on properly adapted numerical controlled 3 axis milling machine using a ceramic tool and special designed fastening device. The tool dimensions have been estimated according to the algorithm shown in the literature [4]. All joints were made of end-to end (butt) configuration under different welding speed. The rotational speed of the tool and tool offset was constant. The effect of selected technological parameters on the quality of the joint was analyzed. Produced butt joint have been subjected to a static tensile testing to identify mechanical features of the materials of joints compared to parent materials. Measurements of micro hardness HV in the plastically formed stir zone of joint and in the parent material have been carried out. Axial and radial welding forces in the joining region were recorded during the tests and their dependency from the welding parameters was studied. Based on the results of strength tests the efficiency of joints for sheets of 0.5 mm in thicknesses oscillated up to 96% compared to the parent material. It has been found that for given parameters the correct, free of defects joints were obtained. The paper also presents the results of low-cycle fatigue tests of obtained FSW joints. The use of a ceramic tool in the FSW process allows to obtain welds with higher strength than conventional tools. The results suggests that FSW can be potentially applied to joining aluminum alloys.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1385-1394
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected problems concerning maintenance of structures
Wybrane problemy utrzymania obiektow budowlanych
Autorzy:
Slusarek, J.
Powiązania:
https://bibliotekanauki.pl/articles/40569.pdf
Data publikacji:
2007
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
building element
external environment
building structure
maintenance
sustainable building
sustainable development
durability
rehabilitation method
repair method
environment condition
building material
diagnostic test
local climate
solar temperature
thermal stress
Źródło:
Acta Scientiarum Polonorum. Architectura; 2007, 06, 4; 3-21
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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