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    Wyświetlanie 1-6 z 6
    Tytuł:
    Analysis of the possibility of using acoustic emission for monitoring technical condition of the fuel injector in 3AL25/30 engine
    Autorzy:
    Dudzik, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/27315939.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    emisja akustyczna
    diagnostyka
    monitoring
    wtryskiwacz
    układ paliwowy
    acoustic emission
    diagnostics
    injector
    fuel system
    Opis:
    Acoustic emission method (AE) can be used for the diagnosis of machine parts such as, for example: fuel injectors. This paper presents the methodology and research results of 3AL25/30 engine fuel injector. During research was studied one injector in good condition and second with simulated failure involving closing 2 of 9 holes of the injector tip. Research was carried out on a laboratory test stand using a set of acoustic emission Vallen System. This set included: 4 channel signal recorder AMSY 6, two measurement modules ASIP-2/S, preamplifier with a frequency range 20 kHz-1 MHz and the strengthening of 34 dB, AE signal measurement sensor type VS 150M, with a frequency range 100-450 kHz. During the study, the acoustic emission (AE) generated by tested injector was recorded. The following parameters were determined: amplitude, rise time, duration time, total time, number of events - hits, the effective value of the signal (RMS). Analysis of the results showed significantly longer total time of the injection in the case of damaged injector compared to the injector in good conditions. Signal amplitude was higher, however, the RMS signal reached approximately 3-times lower value for the injector with damaged tip. This means lower quality fuel atomization. Laboratory test results were compared with signals recorded on injectors installed in the engine. Analysis of the signals allowed detection damage of the injector installed in the engine during normal operation.
    Źródło:
    New Trends in Production Engineering; 2018, 1, 1; 419-425
    2545-2843
    Pojawia się w:
    New Trends in Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties of AW-5083 alloy joints welded by hybrid method : FSW and MIG
    Autorzy:
    Dudzik, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/241583.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    hybrid welding
    Friction Stir Welding
    FSW
    welding
    MIG
    aluminium alloys
    joints
    mechanical properties
    shipbuilding
    Opis:
    The article presents the research results on the mechanical properties of aluminum alloy AW-5083 and its joints welded by hybrid method – traditional MIG and FSW. AW-5083 alloy is the most currently used in shipbuilding industry. Friction Stir Welding (FSW) – a new technology can be successfully used for butt-welding of different types of aluminum alloy sheets. FSW method can be an alternative to traditional arc welding methods i.e. MIG or TIG. Hybrid welding (FSW with MIG or TIG) could be used in cases when joining only by FSW is not possible. Welding parameters used for the connection of the sheets were presented. Metallographic analysis showed the correct construction of structural bonded joints. The research was carried out using a static tensile test in accordance with the requirements of the Standard PN-EN ISO 4136:2013-05. Flat samples cut perpendicular to the direction of rolling were used. The research was conducted at the temperature of +20ºC. The test shows that the mechanical properties of joints made by hybrid method compered to native material were lower. The tensile strength of joint was lower by 20% then native material 5083 while its yield stress was lower only about 6%. The biggest change was observed in case of plastic properties. Elongation of joint was over 50% lower compared to native material. Despite the decrease of mechanical properties, they meets the requirements of classification societies, so the conclusion is that hybrid method (FSW and MIG) of joining AW-5083 can be applied in shipbuilding industry.
    Źródło:
    Journal of KONES; 2019, 26, 4; 47-52
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The possibility of applying acoustic emission method for monitoring lathing process
    Autorzy:
    Dudzik, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/245585.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    Acoustic Emission
    AE
    diagnostic
    finishing treatment
    lathing
    cutting parameters
    Opis:
    Nowadays acoustic emission (AE) method is used in many fields of science, including in the diagnosis and monitoring of machining processes such as turning, grinding, milling, etc. Monitoring of turning process allows ensuring stable conditions of treatment. Stable conditions of turning process have a great impact on the quality of the surface. This is especially important during finishing treatment. The research was carried out on a universal ZMM-SLIVEN CU500MRD lathe centre-using tool with removable insert SANDVIK Coromant WNMG 080408 – WMX Wiper. Lathing process was performed on the shaft of 74 mm in diameter made of S235 steel. The research was carried out at constant cutting speed v = 230 m/min. Changed parameters were feed f = 0.1; 0.2; 0.4 mm/rev and cutting depth ap = 0.5; 0.75; 1 mm. In the research was used a set of acoustic emission Vallen System. The kit includes: 4 channel signal recorder AMSY 6, two measurement modules ASIP-2/S, preamplifier with a frequency range 20 kHz – 1 MHz and the strengthening of 34dB and AE signal measurement sensor type VS 150M, with a frequency range 100 – 450 kHz. During the study, the acoustic emission (AE) generated during the lathing process were recorded parameters e.g. amplitude, number of events – hits, the effective value of the signal (RMS). The test results indicate, that the higher instability of the process was during turning with parameters: ap = 0.75 mm and f = 0.1 mm/rev. The study can be the basis for the use of acoustic emission method for monitoring lathing process to ensure stable conditions of that process and the same to obtain a high quality surface.
    Źródło:
    Journal of KONES; 2019, 26, 2; 21-27
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An overview of different possibilities to master the challenge of coupling an ae-sensor to an object of interest partly using examples of previous investigations
    Autorzy:
    Ziegler, Burkhard
    Dudzik, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/242674.pdf
    Data publikacji:
    2019
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    acoustic emission sensor
    application
    mounting
    couplant
    waveguide
    Opis:
    Acoustic emission analysis is defined as a passive, non-destructive investigation method, which only listens for AEwaves (AEW), generated actively by an object of interest. Therefore, the AEW must have the possibility to propagate from their source to an acoustic emission sensor (AES). By virtue of the piezoelectric effect, the AEW transmitted into electrical signals inside of the AES. During the analysation of these electrical signals we earn –online– information about the object of interest, e.g. the operating characteristic of a machine or the strength of the friction of a tribolocical system. To enable the AEW to propagate into the AES, the sensor has to be fixed suitable onto the object of interest. Hereby has to be strictly respected, that the sensor is fixed in a reproducible mechanical way as well as to ensure that the through-transmission has a weak attenuation (couplant). Standard AES have the shape of a circular cylinder (diameter and height depend on the operation purpose), the AEW pass through one of the frontends into the sensor. The objects of interest can have different geometry of the surface (e.g. plane, cylindrical, unspecific) or temperatures which usually conflicting the operating range of the sensor. Depending on the operational purpose, there are many different couplants to use. This article offers help to master the different connecting challenges within the range of acoustic emission analysis.
    Źródło:
    Journal of KONES; 2019, 26, 1; 207-214
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odporność korozyjno-naprężeniowa i zmęczeniowo-korozyjna okrętowych stopów aluminium i ich spawalność
    Corrosion - stress and fatigue - corrosion strength of marine aluminum alloys and their weladablility
    Autorzy:
    Jurczak, Wojciech.
    Dudzik, Krzysztof.
    Powiązania:
    Zeszyty Naukowe / Akademia Marynarki Wojennej im. Bohaterów Westerplatte 2012, nr 2(189), s. 63-76
    Data publikacji:
    2012
    Tematy:
    Okręty budowa badanie
    Metody badawcze
    Konstrukcje spawane
    Ochrona antykorozyjna
    Opis:
    Rys., tab.
    Bibliogr.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Acoustic Emission as a Method for Analyzing Changes and Detecting Damage in Composite Materials During Loading
    Autorzy:
    Panasiuk, Katarzyna
    Dudzik, Krzysztof
    Hajdukiewicz, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/1945653.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    multilayered composite
    recycling
    mechanical properties
    acoustic emission
    Opis:
    Thanks to their excellent strength and durability, composite materials are used to manufacture many important structural elements. In the face of their extensive use, it is crucial to seek suitable methods for monitoring damages and locating their origins. The purpose of the article was to verify the possibility of applying the acoustic emissions (AE) method in the detection of damages in the structures of composite materials. The experimental part comprised static tensile tests carried out on various sandwich composites, including simultaneous registration of elastic waves with increasing loads, carried out with the use of an acoustic-electrical sensor connected. The signal obtained from the sensor was then further processed and used to draw up diagrams of the AE hits, amplitude, root mean square of the AE source signal (RMS) and duration in the function of time. These diagrams were then applied on their corresponding stretching curves, the obtained charts were analysed. The results obtained point to a conclusion that the acoustic emissions method can be successfully used to detect and locate composite material damages.
    Źródło:
    Archives of Acoustics; 2021, 46, 3; 399-407
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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