Technical Transactions iss. 26. Mechanics iss. 4-M

Technical Transactions iss. 26. Mechanics iss. 4-M

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Collection items (16)


Rapid e-learning tools on the Moodle platform

Walasek, Tomasz A., Kucharczyk, Zygmunt, Szewczyk, Krzysztof, Morawska-Walasek, Dorota
Article
2015
One of the most frequently highlighted problems regarding online teaching reported by teachers is the time and effort required to prepare and regularly update attractive e-content. This is particularly true for multimedia content. On the other hand, the problem often reported by students is the low aesthetic value and teachers’ failure to produce materials that students deem to be aesthetically attractive. This article presents some suggestions on possible ways to control and manage the visual side of e-content.

Investigations of strength and leak tightness of wave-ring gaskets

Trojnacki, Andrzej, Szybiński, Bogdan
Article
2015
The paper deals with stress-strain analysis and estimation of leak tightness of wave-ring gaskets. The investigations are carried out using the simplified analytical approach. A cylindrical shell of constant mean thickness is introduced to simulate the gasket. It is assumed that the shell is simply supported at the inner surface of the seat. The influence of certain geometric and assembly parameters on the strength and leak tightness of the closure is analytically investigated. The results are presented in dimensionless variables in order to generalise the conclusions. The analytical solution is verified by FEM calculations and compared with the experimental results.

The influence of molibdenum on corrosion resistance of sintered austenitic stainless steels

Szewczyk-Nykiel, Aneta
Article
2015
Molybdenum was introduced into sintered austenitic stainless steels to improve their corrosion resistance. The influence of different Mo contents on the pitting corrosion resistance of AISI 304L and 316L steels in 0.1 M sodium chloride solution has been investigated. The corrosion behaviour was evaluated by potentiodynamic polarisation method. Sintered Mo-containing 304L steel is less prone to pitting corrosion in environment containing chlorides than 316L with Mo addition. The introduction of molybdenum to 304L steel resulted in an improvement of corrosion resistance. This steel exhibits the highest value of polarisation resistance as well as the lowest value of corrosion rate.

The poles method for second-order linear time-varying systems

Siwczyński, Maciej, Jaraczewski, Marcin
Article
2015
In dynamic linear systems described by differential equations with constant parameters, the poles of the rational function (transfer function of the system) play an important role. This article attempts to expand the poles concept in a situation where the system is described by the second-order linear system with timevarying parameters. It then introduces the concept of characteristic equations and time-dependent poles.

The poles method for higher-order linear time-varying systems

Siwczyński, Maciej, Jaraczewski, Marcin
Article
2015
In dynamic linear systems described by differential equations with constant parameters, the poles of the rational function (transfer function of the system) play an important role. This article attempts to expand the poles concept in a situation where the system is described by the N-th order linear system with time-varying parameters. It then introduces the concept of characteristic equations and time-dependent poles.

Innovative approach to postgraduate education in the field of fluid power technology

Pobędza, Janusz, Guzowski, Artur
Article
2015
The article presents the developed, innovative model of postgraduate education in the area of fluid drive and control technology, launched in the Cracow University of Technology. The program of postgraduate studies was elaborated in accordance with the CETOP guidelines. Characteristics of education on hydraulic and pneumatic systems are presented together with the proposed model of studies and its innovative components.

Perspectives on avation training in Polish Universities

Marszałkiewicz, Jakub
Article
2015
This article presents the potential for development of aviation education at Polish Universities with a focus on aircraft mechanics training certified by the Civil Aviation Authority in Warsaw and the European Aviation Safety Agency (EASA). An engineering graduate who obtains such a licence in addition to having a diploma would have no problems with finding a suitable employment.

Modern methods of teaching engineers studying environmentally friendly composites

Kuciel, Stanisław, Kuźniar, Paulina
Article
2015
This paper explains why and how to teach engineering students studying structural materials obtained from renewable sources. It describes modern approaches in the education of materials science including focussing on design strategies, sustainability and the use of modern educational tools.

The possibility of using multi-criteria methods as innovative tools for supporting postgraduate education

Korniejenko, Kinga
Article
2015
The aim of the article is to analyse the possibility of using multi-criteria methods for support in planning the postgraduate program, their implementation and their evaluation. Multi-criteria methods, which are used to support the decision-making process, are a response to the complexity of contemporary problems, including uncertainty, incomplete data and changing environment. One of these issues is matching the postgraduate program to the current requirements of potential students. The research methods used in this article are a critical analysis of literary sources and a case study of the ‘PIT Mobile postgraduate studies in collaboration with industry’ project, financed by the European Social Fund.

The didactic and scientific research capabilities of the Laboratory of Hydraulic Drives & Vibroacoustics of Machines

Kollek, Wacław, Osiński, Piotr, Radziwanowska, Urszula, Stosiak, Michał
Article
2015
This article presents a description of the equipment and the didactic and scientific research capabilities of the Laboratory of Hydraulic Drives & Vibroacoustics of Machines located at the Faculty of Mechanical Engineering of Wrocław University of Technology. In the article, the main areas of the laboratory activity are indicated as well as didactic offer including presentation of currently available test rigs.