FATIGUE LIMIT EVALUATION USING THERMOGRAPHIC MEASUREMENT DURING CYCLIC LOADING - 1D AND 2D METHOD

1 TESAŘ Jiří
Co-authors:
2 ŠVANTNER Michal 3 SKÁLA Jiří 4 NOVÁK Matyáš
Institutions:
1 University of West Bohemia, New Technologies - Research Centre, Plzeň, Czech Republic, tesar@ntc.zcu.cz
2 University of West Bohemia, New Technologies - Research Centre, Plzeň, Czech Republic, msvantne@ntc.zcu.cz
3 University of West Bohemia, New Technologies - Research Centre, Plzeň, Czech Republic, jskala@ntc.zcu.cz
4 Research and Testing Institute Plzeň, Plzeň, Czech Republic, novak@vzuplzen.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
603-608
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
27 views / 8 downloads
Abstract

Testing of material fatigue properties belongs to important material examinations. A standard fatigue measurement is mostly a time-consuming and expensive experiment, among others due to a number of samples needed. Infrared thermography is a method for a noncontact temperature measurement. Thermographic methods can detect small temperature changes caused by transformations between mechanical and thermal energy during a cyclic loading. This allows a use of the thermographic methods for fatigue testing. This contribution is focused on a development of an online thermographic method for fatigue limit evaluation during a sample cyclic loading. A novel 2D approach of fatigue limit evaluation is introduced. It brings a pixel wise view, which advantages compared to a standard 1D evaluation are demonstrated. It is presented a good correlation of results obtained by a standard Wöhler curve based evaluation and by thermographic methods.

Keywords: Cyclic fatigue, infrared thermography, online evaluation, 2D fatigue limit evaluation
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