Abstract
In this work, the influence of micro-voids on damage severity under fretting fatigue conditions is analysed for a regular and a random distribution of micro-voids. The finite element method is employed to obtain the stress field during a loading cycle. The well-known Smith-Watson-Topper and McDiarmid multiaxial fatigue criteria are assessed by means of critical plane analysis. Additionally, averaging methods are employed in order to consider the length scale for damage initiation. Furthermore, a direct comparison with the homogeneous case is presented. Different size and distribution of micro-voids are analysed. The numerical results show that the heterogeneity has a noticeable influence on the damage severity. In addition, the numerical model suggests that damage may firstly initiate at the upper edge of the micro-voids located close to the contact edge, generally leading to a mean increase of the damage severity. However, in some cases, the introduction of micro-voids reduces the stress intensity at the contact edge, and therefore, decreases the damage severity in the vicinity of the contact edges.
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Acknowledgements
The authors gratefully acknowledge the financial support given by the Spanish Ministry of Economy and Competitiveness and the FEDER program through the projects DPI2017-89197-C2-1-R, DPI2017-89197-C2-2-R and the FPI subprogram with the reference BES-2015-072070. The support of the Generalitat Valenciana, Programme PROMETEO 2016/007, is also acknowledged. The last author would like to acknowledge the financial support of the Research Foundation-Flanders (FWO), The Luxembourg National Research Fund (FNR) and Slovenian Research Agency (ARRS) in the framework of the FWO Lead Agency project: G018916 N ‘Multi-analysis of fretting fatigue using physical and virtual experiments’.
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Infante-García, D., Miguelez, H., Giner, E., Abdel Wahab, M. (2020). Damage Assessment in Fretting Fatigue Specimens with Micro-voids Using Critical Plane Approach. In: Wahab, M. (eds) Proceedings of the 13th International Conference on Damage Assessment of Structures. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-8331-1_51
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DOI: https://doi.org/10.1007/978-981-13-8331-1_51
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