MATEC Web Conf.
Volume 165, 201812th International Fatigue Congress (FATIGUE 2018)
|Number of page(s)||6|
|Section||Creep-Fatigue Interactions / Fatigue at Very High Temperatures|
|Published online||25 May 2018|
Experimental and numerical investigation of strain distribution of notched lead fatigue test specimen
Nexans Norway, Innspurten 9, 0663 Oslo, Norway
2 Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology (NTNU), Norway
3 Sintef Materials and Chemistry, Richard Birkelands vei 2B, 7031, Trondheim, NORWAY
* Corresponding author: firstname.lastname@example.org
The work here presented focuses on the test methodology related to effect of stress concentrators in strain controlled structures. Cable sheathing as used in subsea power cables are investigated by cyclic fatigue testing, Digital Image Correlation (DIC) and 3D Finite Element Analysis. Focus is put on the strain distribution in conventional specimen geometries and under the presence of artificial notches. It is evident that standardized fatigue testing provides limited input to the final fatigue life of strain controlled power cable sheathing both accounting for expected and unintended stress concentrators. The limitations can be explained by measured strain distribution inherent in most fatigue test specimens. The use of DIC and 3D FEM provides valuable insight into both the theoretical and practical stress and strain distribution. This can help in understanding and overcoming geometrical test constraints, when compared to the actual component loading mode.
© 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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