Abstract
Fretting problem arises in the case of relatively small sliding motion between contacting surfaces. Fatigue life of the components that are in contact with each other, especially in rotorcraft may be significantly reduced due to fretting. The purpose of this study is to investigate material inhomogeneity near the contact region on the fretting problem in a cylindrical on flat contact configuration. A finite element (FE) model was constructed by using commercial finite element package ABAQUSTMto study partial sliding and stress concentrations. In order to investigate the effect of material inhomogeneity, the fretting contact is analyzed by introducing voids near the contact region. The void size and an array of voids is introduced into the substrate. The results are compared in terms of pressure, shear traction, tangential stress magnitudes and relative slip between the contacting materials.
Highlights
When relative small sliding takes in place between two contacting surfaces, failure due to fretting can occur, such as bolted joints and lug attachments of aircrafts
The purpose of this study is to investigate material inhomogeneity near the contact region on the fretting problem in a cylindrical on flat contact configuration
In order to investigate the effect of material inhomogeneity, the fretting contact is analyzed by introducing voids near the contact region
Summary
When relative small sliding takes in place between two contacting surfaces, failure due to fretting can occur, such as bolted joints and lug attachments of aircrafts. In order to investigate the fretting phenomena, there are numerous studies which were done with using both analytical and finite element (FE) methods can be found in literature. To observe the pressure distribution in the frictionless contact region between two elastic materials, the analytical approach is developed by Hertz [2] which is called Hertzian contact theory. Mindlin theory divides the contact interface in two main regions, which are called as stick and slip, with using shear traction distribution. In addition to that Nowell [5] reported that Mindlin theory is inadequate to calculate shear traction distribution for contact between elastically dissimilar materials. Numerous works were done in the literature in order to model fretting contact by using finite element methods.
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