Wyniki wyszukiwania - BazTech

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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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Obróbka cieplno-mechaniczna stopów Mg

Sułkowski Bartosz

Stal, Metale & Nowe Technologie

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2021

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nr 9-10

44--48

PL

Stopy magnezu ze względu na mały ciężar właściwy są stosowane w tych gałęziach przemysłu, w których redukcja masy jest kluczowa. Mowa tutaj o przemyśle samochodowym, lotniczym i kosmicznym. Wadami stopów magnezu są podatność na korozję oraz słabe własności mechaniczne. Wytrzymałość na rozciąganie w stopach magnezu rzadko przekracza 300 MPa i bardzo szybko maleje wraz ze wzrostem temperatury.

EN

Due to their low specific weight, magnesium alloys are used in industries where weight reduction is crucial. We are talking about the automotive, aerospace and aerospace industries. The disadvantages of magnesium alloys are susceptibility to corrosion and poor mechanical properties. The tensile strength in magnesium alloys rarely exceeds 300 MPa and decreases very quickly as the temperature increases.

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Design optimization for the weight reduction of 2-cylinder reciprocating compressor crankshaft

Arshad Ali, Cong Pengbo, Elsayed Elmenshawy Adham Ahmed Awad, Blumbergs Ilmārs

Archive of Mechanical Engineering

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2021

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LXVIII, nr 4

449--471

EN

This study aims to optimize the 2-cylinder in-line reciprocating compressor crankshaft. As the crankshaft is considered the "bulkiest" component of the reciprocating compressor, its weight reduction is the focus of current research for improved performance and lower cost. Therefore, achieving a lightweight crankshaft without compromising the mechanical properties is the core objective of this study. Computational analysis for the crankshaft design optimization was performed in the following steps: kinematic analysis, static analysis, fatigue analysis, topology analysis, and dynamic modal analysis. Material retention by employing topology optimization resulted in a significant amount of weight reduction. A weight reduction of approximately 13% of the original crankshaft was achieved. At the same time, design optimization results demonstrate improvement in the mechanical properties due to better stress concentration and distribution on the crankshaft. In addition, material retention would also contribute to the material cost reduction of the crankshaft. The exact 3D model of the optimized crankshaft with complete design features is the main outcome of this research. The optimization and stress analysis methodology developed in this study can be used in broader fields such as reciprocating compressors/engines, structures, piping, and aerospace industries.

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Opracowanie konstrukcji i technologii obróbki innowacyjnej zasuwy energetycznej

Stanisław Adamczak, Miko Edward, Makieła Włodzimierz, Nowakowski Łukasz, Skrzyniarz Michał, Jarema Marek, Świderski Jacek, Dobrowolski Tomasz, Wójcik Czesław

Mechanik

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2020

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R. 93, nr 12

6--10

EN

The article presents the results of the research project in cooperation between Kielce University of Technology and Chemar Armatura Sp. z o.o. Project co-financed by european funds was entitled: “Putting into the production of an innovative series of energy wedge gate which is equipped with two-part wedge and swing disk, as a result of R&D works at Chemar Armatura”.

PL

W artykule przedstawiono wyniki pracy badawczej prowadzonej przez Politechnikę Świętokrzyską w Kielcach oraz Chemar Armatura Sp. z o.o., dofinansowanej z funduszy europejskich w ramach projektu pt. „Wdrożenie do produkcji w firmie Chemar Armatura innowacyjnego typoszeregu zasuw klinowych wyposażonych w klin dwudzielny z przesuwanymi dyskami wahliwymi, jako wynik zleconych prac B+R”.

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Possibility of optimizing the chassis of modern passenger wagons in relation to reduction of their weight

Gazdulski T., Lewiński J., Far M.

Pojazdy Szynowe

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2018

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Nr 4

27--34

EN

The requirements imposed on modernized and new rail vehicles are increasing. They are related to safety and environmental protection, and aimed at improving the travel operational parameters and comfort. Therefore, the weight reduction of rail vehicles plays an increasingly important role in the designing process. The paper presents the construction of the chassis of modern passenger coaches and specification of the masses of particular components of the coach chassis. The directions of development of the passenger coach chassis are proposed, with a view to reduce its weight.

PL

Wymagania stawiane zarówno modernizowanym jak i nowym pojazdom szynowym są coraz większe. Dotyczą one bezpieczeństwa i ochrony środowiska, a z drugiej strony polepszenia parametrów eksploatacyjnych oraz komfortu podróżowania. Redukcja masy pojazdów szynowych odgrywa coraz większą rolę podczas procesu konstruowania. W artykule przedstawiono konstrukcję podwozi współczesnych wagonów osobowych, dokonano analizy mas poszczególnych elementów podwozia wagonowego oraz zaproponowano kierunki rozwoju budowy konstrukcji podwozi wagonów osobowych w odniesieniu do redukcji masy.

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Weight reduction of motorcycle frame by topology optimization

Bala Manikandan C., Balamurugan S., Balamurugan P., Lionel Beneston S.

Journal of Achievements in Materials and Manufacturing Engineering

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2018

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Vol. 91, nr 2

67--77

EN

Purpose: of this paper is to improve the fuel efficiency of electrical motorcycle by reducing the weight of its frame without affecting the basic functionalities, dimensions and performance. Design/methodology/approach: Weight reduction of the frame was achieved by topology optimization technique. Initially the load and stresses acting on the frame was studied. Material of the frame was chosen as Aluminium and the frame was geometrically modelled using Autodesk Fusion 360. With the help of ANSYS AIM 18.2, weight of the frame was optimized by the design modifications suggested by the concept of topology optimization, for the corresponding loads and stresses induced on it. It was observed that the stress induced on the modified design was lesser than that of respective permissible yield stress of the frame material. After optimization, the weight of the frame was reduced from 3.0695 kg to 2.215 kg with the weight reduction of 27.84%. The weight reduction shows that the topology optimization is an effective technique, without compensate the performance of the frame. Approach used in the paper for the weight reduction of the frame is the topology optimization. The modelled frame was topology optimized by using ANSYS 18.2. After the topology optimization, the regions where the metal removal is possible, for weight reduction was identified. Findings: In this paper, the motor cycle frame was optimized and weight of the frame was reduced from 3.065 kg to 2.215 kg. Weight reduction of 27.84% was achieved without compensating the performance. Research limitations/implications: All the components of the automobile may be topology optimized for the weight reduction, thereby improving the fuel efficiency. Innovative design/Improvement in design also possible. Practical implications: By reducing the weight of the frame, weight of the automobile also reduces. Reduction in weight of the automobile leads to improved fuel efficiency. Originality/value: Weight of the motorcycle frame reduced by topology optimization. The regions of material removal at the frame, without compensating the performance was identified.

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Próba stworzenia modelu oceny skuteczności diety stosowanej do redukcji masy ciała

Steinka I., Wachowiak N.

Zeszyty Naukowe Akademii Morskiej w Gdyni

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2014

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nr 86

178--189

PL

Nadwaga i otyłość to problem, który dostrzega coraz liczniejsza grupa specjalistów z dziedziny medycyny i higieny żywienia. Z tego powodu powstają nowe propozycje diet zmniejszających masę ciała. Celem przeprowadzonych badań było zaprezentowanie poglądów populacji, która stosowała i stosuje diety obniżające masę ciała, oraz zapoznanie się z ich zwyczajami żywieniowymi. Na tej podstawie stworzono model matematyczny prognozujący skuteczność diety odchudzającej. Skuteczność diety uwzględniającej preferencje ankietowanych i ogólne założenia związane z zasadami zdrowego odżywiania oraz funkcjonowanie modelu sprawdzano na wybranej grupie osób.

EN

Increas in number of specialists in the medical and food hygiene fields notice the problem of overweight and obesity. As a result, new proposals of diet aimed a tweight reduction continue to emerge. The aim of this study was to present the views of the population of those who have used diets to lower body weight and to learn more about their eating habits. A model for predicting the effectiveness of the weight reduction diet was developed. The diet involved preferences of the respondents and the general principles of healthy eating. The effectiveness of this diet and the functioning of the model were tested on a selected group of people.

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Multi - material design optimization of a bus body structure

Korta J., Uhl T.

Journal of KONES

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2013

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Vol. 20, No. 1

139--146

EN

In the recent years the safety and eco-friendliness have gained much of attention of the automotive stakeholders. These two characteristics are especially important in the case of mass transportation vehicles, such as buses or coaches, which are in continues use for long periods of time, covering significant distances. In such situations, the economical aspects play major role for the transportation companies which try to minimize operational costs of their fleet, by choosing vehicles with reduced fuel consumption. In order to obtain improvements in all the mentioned areas and hence to strengthen their position on the market, bus manufacturers have recently turned their attention to multimaterial design strategies. Structures built in that manner consist not only of regular steel parts, but contain also a mix of components made from various lightweight materials like aluminum alloys or composites, which allow for significant reduction in vehicle curb weight. However, due to the differences in mechanical characteristics which are especially evident in the case of laminates, the material substitution is not a straightforward task. In order to find the material distribution pattern that meets all the requirements, a great number of prototypic numerical models must be prepared and tested. To ease the search for the final solution, optimization techniques can be applied into the design process, allowing for automatic design modifications and assessment of the obtained results. The paper presents an attempt of enhancing the operational characteristics of a bus body structure with simultaneous reduction in the structural weight. In order to find the optimal component configuration, a multimaterial optimization was employed and supplemented by sensitivity and robustness analyses. Such a technique helps to discriminate the over-optimized solutions that are often pointed out as the most desirable by the optimization algorithms which neglect the uncertainties of the analysed system.

9

Biologicznie aktywne składniki żywności wspomagające redukcję masy ciała. Cz. II. Mechanizmy działania

Waszkiewicz-Robak B., Świderski F., Serafin P.

Przemysł Spożywczy

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2007

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T. 61, nr 8

60-64

PL

W artykule scharakteryzowano wybrane substancje bioaktywne przeznaczone do stosowania w dietach redukujących masę ciała, pogrupowane (w zależności od mechanizmu ich oddziaływania na organizm) następująco: zwiększające uczucie sytości, absorbujące tłuszcz i/lub hamujące jego wykorzystanie w organizmie, przyspieszające spalanie tłuszczu lub hamujące syntezę tłuszczu (inhibitory lipazy), modulujące metabolizm węglowodanów. Składniki bioaktywne eliminujące wodę z organizmu, o działaniu moczopędnym i przeczyszczającym oraz zwiększające termogenezę scharakteryzowano w części I artykułu (PS nr 7/2007).

EN

The article has aimed to characterize selected bioactive substances used in the diets supporting weight reduction, classified according to purported mechanism, such as increasing the feeling of satiety, absorbing fat and/or blocking dietary fat absorption, increasing fat oxidation or reducing fat synthesis, modulating carbohydrate metabolism. Bioactive components increasing water elimination of diuretic and purgative activity as well as increasing energy expenditure were characterized in the first part of the article (PS No 7/2007).

10

Biologicznie aktywne składniki żywności wspomagające redukcję masy ciała. Cz. I

Waszkiewicz-Robak B., Świderski F., Serafin P.

Przemysł Spożywczy

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2007

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T. 61, nr 7

28-30

PL

Substancje biologicznie aktywne wspomagające redukcję masy ciała są oferowane konsumentom jako suplementy diety lub środki spożywcze specjalnego przeznaczenia żywieniowego. Scharakteryzowano asortyment tych preparatów znajdujących się na polskim rynku oraz oceniono ich popularność wśród konsumentów. Większą wiedzę z tego zakresu wykazują kobiety. Najbardziej popularnymi preparatami do stosowania w redukcji masy ciała są: czerwona i zielona herbata, preparaty chromu oraz L-karnityna. W artykule przedstawiono pozytywne i negatywne aspekty stosowania substancji bioaktywnych pomagających w redukcji masy ciała. W cz. I scharakteryzowano składniki bioaktywne eliminujące wodę z organizmu, mające działanie moczopędne i przeczyszczające oraz zwiększające termogenezę. W części II omówione zostanie działanie pozostałych grup substancji bioaktywnych stosowanych w redukcji masy ciała.

EN

The bioactive substances used in preparations supporting weight reduction are offered in a diversified form: as dietary supplements or food products of special dietary appropriation. The study has characterized the assortment of these preparations on the Polish market and assessed consumers' knowledge about them. Women showed a greater knowledge in this field. The most popular preparations used in weight reduction among the Polish society are: red and green tea, chromium preparations and L-carnitine. The thesis also presents positive and negative aspects of such treatments.