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Wyświetlanie 1-6 z 6
Tytuł:
The role of lightweight materials in modern transport vehicles
Autorzy:
Ćwiek, Janusz
Wierzbicki, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2146733.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
transport
polymer
materials
plastics
composites
kompozyt
polimer
tworzywo sztuczne
Opis:
Polymeric materials and their composites in vehicles have experienced a real boom in the last 30 years, and their application is increasing with a tendency to further growth. The demands on the modern vehicle industry, whether they are trains, planes, or cars, are ever challenging - users want high-performance vehicles, but at the same time they are looking for improved reliability and safety, greater comfort, and low pricing. Changing the proportion of light-weight materials to steel in the construction of new vehicles helps make them lighter and more fuel or electrical energy efficient, resulting in lower greenhouse gas emissions. There is one family of materials that is responding to the challenge of these potentially conflicting demands: polymer materials. This includes relatively pure chemical materials as well as fibre-filled polymer composites.65 This article presents polymeric materials that are used for the production of vehicle parts today.
Źródło:
Diagnostyka; 2022, 23, 4; art no 2022405
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the applicability of basalt fiber-reinforced epoxy composites in vehicle construction
Autorzy:
Ćwiek, Janusz
Wierzbicki, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/27314073.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
composites
basalt
fiber
transport
kompozyty
bazalt
błonnik
Opis:
This article presents a description of the properties of basalt fibers and polymer composites containing basalt fibers. Basalt fibers are seen as a potentially beneficial component in composite development, especially for vehicles in transport applications. The article also presents the results of the mechanical properties investigation of the glass-epoxy and basalt-epoxy composites. The composites for testing were prepared using the popular hand lay-up method. The samples were cut from prepared plates using abrasive water jet methods. The obtained samples were tested to evaluate their flexural strength and interlaminar sharing strength. The achieved mechanical properties were compared.
Źródło:
Transport Problems; 2023, 18, 1; 43--53
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the share of natural gas in the total fuel supply dose on the combustion process in a CRDI engine
Autorzy:
Wierzbicki, Sławomir
Boruta, Grzegorz
Konieczny, Łukasz
Łazarz, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/2098083.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
CNG
Common Rail
dual-fuel engine
course of combustion
heat release
silnik dwupaliwowy
przebieg spalania
wydzielanie ciepła
Opis:
Natural gas is one of the potential combustion engine fuels whose proportion in the overall energy balance is expected to increase. Owing to some of its properties, its use requires a dual-fuel supply system; thus, the use of natural gas as a fuel for diesel engines is currently limited. Systems that supply gas fuel to diesel engines do not usually interfere with the engine control system. This solution significantly reduces system-installation costs. However, as demonstrated in the present study, it considerably changes the course of the combustion process, which increases thermal and mechanical loads. In this case, the combustion process can be controlled by changing the liquid fuel injection pressure or advancing the injection angle. This, however, requires interference with the engine control system.
Źródło:
Transport Problems; 2021, 16, 1; 141--150
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Visualization of vibrations in structural diagnoses of technical objects
Autorzy:
Śmieja, Michał
Wierzbicki, Sławomir
Kuriata, Magdalena
Ciepliński, Tomasz
Szumilas, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/127832.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
motion magnification
vibration
image processing
diagnostics
uwydatnienie ruchu
drgania
przetwarzanie obrazów
diagnostyka
Opis:
One of the key methods for diagnosing the structural degradation of technical objects relies on observations of mechanical vibrations that accompany equipment operation and damage. Hardware and software advancements and the development mathematical methods for modelling and inference have increased the popularity of vibroacoustic diagnostics in mechanical systems. Displacement in the time domain of physical points in a vibrating object is the primary diagnostic symptom that undergoes further processing in the measurement system. At present, vibrations are usually registered with the use of accelerometers or optical sensors. Advanced tools for image recording, processing and analysis are deployed in quasi-realistic observations of motion that cannot be perceived by the human senses. This article discusses a method for visualizing vibrations based on deliberate deformation of the registered image through motion magnification. The presented approach is illustrated with selected examples.
Źródło:
Vibrations in Physical Systems; 2019, 30, 2; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emissions from a medium-duty CRDI engine fuelled with diesel-biodiesel blends
Autorzy:
Duda, Kamil
Wierzbicki, Sławomir
Mikulski, Maciej
Konieczny, Łukasz
Łazarz, Bogusław
Letuń-Łątka, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2203846.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
biodiesel
fuel blending
exhaust emissions
common-rail
engine efficiency
mieszanie paliw
emisja spalin
common rail
sprawność silnika
Opis:
In the present work, biofuels produced from different raw fatty materials have been proposed as a dominant fuel component in biodiesel-diesel fuel blends. Biofuels were produced from pork lard and rapeseed oil by alkali transesterification using methyl alcohol. Blends of biofuels in volumetric proportions of 60 and 80% of the biocomponent and the remaining part of the conventional fuel were used in a compression ignition engine designed for medium-duty vehicles. The experiments were conducted at two engine rotational speeds (1500 and 3000 rpm, respectively) and a set of load conditions (50, 100, and 200 Nm, respectively). The tests focused on engine efficiency parameters (brake-specific fuel consumption and brake fuel conversion efficiency) as well as exhaust gas emissions (hydrocarbons, carbon monoxide, and carbon dioxide were determined). The obtained results indicate that blends containing biocomponents produced from pork lard were characterized by superior fuel consumption and efficiency results, compared to blends containing biocomponents produced from rapeseed oil. In terms of exhaust emissions, biocomponents produced from pork lard were also characterized by lower emission of all of the examined components compared to rapeseed methyl ester-diesel blends. This study proposes that fuel components obtained from custom (animal) raw-fatty material can be an effective substitute for commonly used rapeseed oil methyl esters.
Źródło:
Transport Problems; 2021, 16, 1; 39--49
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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