Mechanics Issue 4-M (26) 2015

2015

Publication date: 22.08.2016

Licence: None

Editorial team

Secretary Dorota Sapek

Editor-in-Chief Józef Gawlik

Issue content

The analysis of the product platform
in the ELEKTROBUDOWA S.A. company

Robert Cieślak, Ireneusz Wysocki

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 3-9

https://doi.org/10.4467/2353737XCT.15.362.4853

The paper presents the development trends of modern assembly techniques. It focuses both on the significance of an assembly platform for the ELEKTROBUDOWA S.A. company and the analysis of technological processes of assembly, which costitutes a very important element in designing the structure of a production system. The work analyses the strengnts and weaknesses of assembly platforms. It also gives an overview of the five important stages in designing their structure.

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Power engineering – the Ministry-commissioned course of study carried out at Czestochowa University of Technology from 2012 to 2015

Adam Dużyński

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 11-26

https://doi.org/10.4467/2353737XCT.15.363.4854

This study discusses the progress of the engineers’ studies in the Ministry-commissioned Power Engineering course conducted in the Faculty of Mechanical Engineering and Computer Science at Czestochowa University of Technology (FMECS, CUT) in the period 2012–2015.

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Testing of mechanical and acoustical parameters of polyurethane materials with desirable properties

Zygmunt Dziechciowski, Andrzej Czerwiński, Stanisław Kuciel, Tomasz Prociak

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 27-37

https://doi.org/10.4467/2353737XCT.15.364.4855

This paper summarises the results of the testing of the mechanical and acoustical behaviour of polyurethane materials with desirable properties. Testing was performed on several samples of materials which were modified during the manufacturing processes. Tests of mechanical parameters included, among other things, the Young modulus and the energy dissipation rate. Tests were conducted on the model 43 MTS Criterion hydraulic testing machine. In the framework of the acoustic research, sound absorption coefficient measurements were conducted. The sound absorption coefficient was measured with the type 4002 Bruel & Kjaer standing wave apparatus. Characteristics of the tested materials are provided.

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Evaluation of the suitability of study visits to external companies as a strategy for familiarising students with a business environment

Ewa Frączek, Anna Plichta, Piotr Plichta, Danuta Wiszniewska

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 39-49

https://doi.org/10.4467/2353737XCT.15.365.4856

This paper presents the results of the evaluation of several study visits. On that basis, it discusses the issue of the suitability of study visits in external companies for the wider process of familiarising students with the business and market environment.

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The Moodle platform’s Lesson module as an example of effective e-learning

Szymon Hernik

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 51-58

https://doi.org/10.4467/2353737XCT.15.366.4857

In the era of distance communication, areas such as education can try to find a place in the digital world. The possibility of distance learning, due to widespread access to the Internet, can provide valuable educational activities without the necessity for the student to leave their home. A perfect example of this approach is the module ‘Lesson’ contained within the Moodle platform. This allows not only the opportunity to present attractive knowledge but also the possibility for student evaluation on an ongoing basis whilst they are still learning. This functionality is one of the most dynamic components of the platform – it enables two-way interactivity between teacher and student.

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

Wacław Kollek, Piotr Osiński, Urszula Radziwanowska, Michał Stosiak

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 59-68

https://doi.org/10.4467/2353737XCT.15.367.4858

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.

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

Kinga Korniejenko

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 69-80

https://doi.org/10.4467/2353737XCT.15.368.4859

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.

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Modern methods of teaching engineers studying environmentally friendly composites

Stanisław Kuciel, Paulina Kuźniar

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 81-92

https://doi.org/10.4467/2353737XCT.15.369.4860

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.

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Perspectives on avation training in Polish Universities

Jakub Marszałkiewicz

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 93-101

https://doi.org/10.4467/2353737XCT.15.340.4861

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.

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

Janusz Pobędza, Artur Guzowski

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 103-116

https://doi.org/10.4467/2353737XCT.15.341.4862

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.

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

Maciej Siwczyński, Marcin Jaraczewski

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 117-122

https://doi.org/10.4467/2353737XCT.15.342.4863

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.

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

Maciej Siwczyński, Marcin Jaraczewski

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 123-130

https://doi.org/10.4467/2353737XCT.15.343.4864

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.

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

Aneta Szewczyk-Nykiel

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 131-142

https://doi.org/10.4467/2353737XCT.15.344.4865

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.

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Investigations of strength and leak tightness of wave-ring
gasket

Andrzej Trojnacki, Bogdan Szybiński

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 143-163

https://doi.org/10.4467/2353737XCT.15.345.4866

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.

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Rapid e-learning tools on the moodle platform

Tomasz A. Walasek, Zygmunt Kucharczyk, Krzysztof Szewczyk, Dorota Morawska-Walasek

Technical Transactions, Mechanics Issue 4-M (26) 2015, 2015, pp. 165-176

https://doi.org/10.4467/2353737XCT.15.346.4867

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.

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Słowa kluczowe: assembly platforms, engineering studies, commissioned courses, power engineering, polyurethane materials, measurements mechanical and acoustical properties, study visits, evaluation, e-learning, Moodle platform, blended learning, hydraulic drives, pneumatic drives, vibroacoustics of machines, multi-criteria methods, analytical hierarchical process (AHP), postgraduate education, academic education, sustainability, biobased materials, aviation training, aircraft engineering, polytechnic education, education, fluid power systems, CETOP, linear systems, time-varying systems, linear systems, time-varying systems, sintered austenitic stainless steel, molybdenum addition, pitting corrosion, potentiodynamic polarization, high-pressure closures, wave-ring gasket, stress-strain analysis, e-learning, rapid authoring tools, moodle