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A Discussion on the Physical Interpretation of Measurements of Tribological Wear

Sadowski Jan

Tribologia

2021

nr 1

27--37

Physical sense and practical significance of major measurements of tribological wear are analysed here. Definitions and methods of assessing these measurements are proposed on the basis of the laws of energy and mass conservation. Contributions of energy and displacement of particular friction forces corresponding to each element of a friction couple are addressed. Energy expenditure that causes wear is introduced into the definition of wear resistance. Planning and thermodynamic analysis of a tribological experiment and the application of thermodynamic concepts and quantities to the description and the interpretation of results are recommended. The author believes application of wear measures that have an unequivocal physical interpretation will limit problems with the incomparability and the irreproducibility of tribological results and issues with transferring them to real objects.

W niniejszej pracy zanalizowano senes fizyczny i praktyczne znaczenie ważniejszych miar zużycia tribologicznego. Zaproponowano definicje i sposoby oceny tych miar w oparciu o zasady zachowania energii i masy. Uwzględniono w nich udział energii i przemieszczenia poszczególnych sił tarcia, które przypadają na każdy z elementów pary ciernej. Do definicji odporności na zużycie wprowadzono nakład energii, który je spowodował. Zalecono zaplanowanie eksperymentu tribologicznego z jego analizą termodynamiczną oraz wykorzystanie pojęć i wielkości termodynamicznych do opisu i interpretacji uzyskanych wyników. Zdaniem autora stosowanie miar zużycia mających jednoznaczną interpretację fizyczną ograniczy problemy nieporównywalności i nie odtwarzalności wyników badań tribologicznych oraz trudności ich przenoszenia na obiekty rzeczywiste.

Quality assurance in the european higher education area

Karkoszka T.

Journal of Achievements in Materials and Manufacturing Engineering

2009

Vol. 37, nr 2

759-766

Purpose of the presented paper aims at motivating the necessity of assuring the quality in higher education by implementation of the quality management system Design/methodology/approach covers the characterisation of strategic aims of the higher education, mostly - the principles of performance of higher education systems making possible the European cooperation and the comparability of the mechanisms and the results of activity. Findings of the carried out research are as follows: implementation of the rules of higher education system should ensure: level of education being the quality standard, coherent educational system allowing for mobile choice of the place of education, universal accessibility of education, lifelong education as well as recognition of knowledge, skills and qualifications in all countries of European Union. Practical implications: refers to any university which wants to assure quality in education by taking part in the Bologna Process. Originality/value: of the presented paper belongs to the idea and the progress of the Bologna Process as a European widespread venture aiming at establishing the European Higher Education Area and determination of the directions of development of higher education and the research systems.