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Unconventional Methods of Joining Composites and Metals in the Context of Weight Reduction of Car Bodies

Sabadka Dušan, Kender Štefan

Advances in Science and Technology. Research Journal

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2023

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Vol. 17, no 1

230--242

EN

One of the basic trends in the automotive industry today is to achieve the most acceptable ratio between the total weight of the car to its overall performance and utility properties. Reducing the weight of cars is largely due to the use of new materials, where composite materials offer a wide space for their application. Composite materials have their specific properties which is very beneficial in reducing the total weight. Another advantages is strength, stiffness, low fiber density, the ability to form them into any shape based on the required applications. One of the challenges associated with the use of composite materials is the search for new technological possibilities of joining composite materials with metals. These include technologies as for example riveting, ultrasonic welding, but especially gluing. Bonding is currently one of the most preferred ways of joining composite materials. The paper deals with testing of technology of bonding composite materials with metals used in the manufacture of automobiles and a comparison of individual results obtained from the experiment.

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Innowacyjne rozwiązania materiałowe w samochodach elektrycznych

Kowalski Jan Daniel, Ilska Anita

Przegląd Włókienniczy - Włókno, Odzież, Skóra

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2020

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nr 1-2

36--40

PL

Artykuł przedstawia problematykę związaną z masą samochodów elektrycznych, metodą ich ładowania oraz zasięgiem. Zaprezentowano rodzaje kompozytów oraz wybrane rozwiązania i innowacyjne koncepcje skupiające się na wykorzystaniu kompozytów, głównie z udziałem włókien węglowych w rozwiązaniach strukturalnych. Pokazano, jak wykorzystuje się materiały naturalne we wnętrzu samochodu elektrycznego marki BMW.

EN

The article presents the problems related to the mass of electric cars, their charging method and range. The paper presents types of composites as well as selected solutions and innovative concepts focusing on the use of composites mainly with the participation of carbon fibres in structural solutions. The use of natural materials in the interior of a BMW electric car is also illustrated.

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Microstructure characterization of localized corrosion wear of Cr/Cr2N+ a-C:H/a-C:H:Cr multilayer coatings on carbon fiber composites

Janusz M., Major L., Lackner J. M., Grysakowski B., Krawiec H.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2017

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Vol. 65, nr 2

171--177

EN

The use of carbon fiber composites (CFC) for different applications is widespread. Carbon-based materials show, however, significant oxidative degradation in air. Modern materials are subjected to aggressive, corrosive environment. This type of environment may strongly reduce their mechanical properties. For the protection of CFC, it was necessary to apply coatings to the composite surface. In the presented paper, a chromium/chromium nitride (Cr/Cr2N) multilayer structure has been selected as the inner part. The outer part of the coating was a hydrogenated amorphous carbon (a-C:H), gradually implanted by Cr nanocrystals. The application of transmission electron microscopy (TEM) indicated that the proposed deposition method allowed the formation of a Cr/Cr2N multilayer of Λ = 150 nm, topped with a-C:H+ Cr23C6 composite of a varied carbides density. The micro-hardness of the deposited coatings was up to 14 GPa (at a load of 2 and 5 mN). The microstructure of the deposited coatings was described in detail by means of TEM in the authors’ recently published paper [1]. This paper is a continuation thereof, aimed at describing microstructure changes after a localized corrosion process. In order to study localized corrosion in coatings, particularly in metallic (Cr) interlayers, the potential measurements and voltammetry experiments were performed in a Ringer solution. The open-circuit potential reaches stable values after a sufficient time period. The results indicated that the presence of a-C:H+Cr23C6, the outer part of the coating, speeds up the localized corrosion process in Cr interlayers in the inner part of a coating.

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Analiza oddziaływań dynamicznych profili z kompozytów węglowych na różne rodzaje wymuszenia

Deuszkiewicz P.

Mechanik

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2016

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R. 89, nr 12

1926--1927

PL

W artykule przedstawiono analizę oddziaływań dynamicznych (np. występowania stanów krytycznych) w konstrukcji z kompozytu węglowo-epoksydowego na przykładzie wału maszynowego przy różnych rodzajach wymuszenia. Przeprowadzony eksperyment miał dać odpowiedź na pytanie, czy da się przewidzieć zachowania dynamiczne występujące w trakcie normalnej eksploatacji (wymuszenie kinematyczne) na podstawie doświadczeń wykonanych na stanowisku laboratoryjnym przy wymuszeniu realizowanym siłą harmoniczną lub impulsową.

EN

The article presents an analysis of dynamic interactions (e.g. occurrence of critical states) with the construction of carbon fiber composite (for example the drive shaft) for different types of excitation. Experiment was conducted to answer the question whether it is possible to predict the dynamic behaviour occurring during normal operation (force kinematic) based on the experiment made at the laboratory when the excitation was implemented as a harmonic or impulse force.