Open Access

ARTICLE

The Effect of Surface Pit Treatment on Fretting Fatigue Crack Initiation

by Qingming Deng^1,2, Xiaochun Yin¹, Magd Abdel Wahab^3,4,*

1 Department of Mechanics and Engineering Science, Nanjing University of Science and Technology, Nanjing, 210094, China
2 Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Faculty of Engineering and Architecture, Ghent University, Zwijnaarde, 9052, Belgium
3 Division of Computational Mechanics, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4 Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

* Corresponding Author: Magd Abdel Wahab. Email:

Computers, Materials & Continua 2021, 66(1), 659-673. https://doi.org/10.32604/cmc.2020.012878

Received 16 July 2020; Accepted 15 August 2020; Issue published 30 October 2020

Abstract

This paper analyses the effect of surface treatment on fretting fatigue specimen by numerical simulations using Finite Element Analysis. The processed specimen refers to artificially adding a cylindrical pit to its contact surface. Then, the contact radius between the pad and the specimen is controlled by adjusting the radius of the pit. The stress distribution and slip amplitude of the contact surface under different contact geometries are compared. The critical plane approach is used to predict the crack initiation life and to evaluate the effect of processed specimen on its fretting fatigue performance. Both crack initiation life and angle can be predicted by the critical plane approach. Ruiz parameter is used to consider the effect of contact slip. It is shown that the crack initial position is dependent on the tensile stress. For same type of model, three kinds of critical plane parameters and Ruiz method provide very similar position of crack initiation. Moreover, the improved sample is much safer than the flat-specimen.

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Citations