MATEC Web Conf.
Volume 157, 2018Machine Modelling and Simulations 2017 (MMS 2017)
|Number of page(s)||7|
|Section||Experimental mechanics, identification and validation|
|Published online||14 March 2018|
Low-cycle fatigue behaviour of laser welded high-strength steel DOMEX 700 MC
University of Zilina, Faculty of Mechanical Engineering, Department of Applied Mechanics, Univerzitná 1, 010 26, Zilina, Slovak Republic
2 University of Zilina, Faculty of Mechanical Engineering, Department of Material Engineering, Univerzitná 1, 010 26, Zilina, Slovak Republic
3 University of Zilina, Faculty of Mechanical Engineering, Department of Technical Sciences and Informatics, Univerzitná 1, 010 26, Zilina, Slovak Republic
* Corresponding author: firstname.lastname@example.org
The article presents the results of research on low cycle fatigue strength of laser welded joints vs. non-welded material of high-strength steel DOMEX 700 MC. The tests were performed under load controlled using the total strain amplitude ɛac. The operating principle of the special electro-mechanic fatigue testing equipment with a suitable clamping system was working on 35 Hz frequency. Fatigue life analysis was conducted based on the Manson-Coffin-Basquin equation, which made it possible to determine fatigue parameters. Studies have shown differences in the fatigue life of original specimens and laser welded joints analysed, where laser welded joints showed lower fatigue resistance. In this article a numerical analysis of stresses generated in bending fatigue specimens has been performed employing the commercially available FEM-program ADINA.
Key words: low-cycle fatigue / laser / welding / high-strength steel
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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