Experimental and numerical investigation of the fretting fatigue of dissimilar mating surfaces

Download

index.pdf

Date

2019

Author

Korkmaz, Yezdan Medet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

237
views

86
downloads

Fretting fatigue experiments and simulations were performed for dissimilar mating materials. In the first part of the study, experiments were conducted using different pad materials to clarify the effect of fretting fatigue on the dissimilar mating materials in terms of friction force, contact surfaces, and fatigue life of the substrate material. Steel and Aluminum pad materials were used in experiments. According to results, fretting fatigue life of the substrate material was dependent on the pad material. The fretting fatigue lives were examined under both high cycle and low cycle fatigue regimes. It was observed that friction force carrying capacity of aluminum pad was higher than steel pad load carrying capacity. In the second part of the study, finite element analysis was performed. The crack initiation lives and crack propagation lives were calculated using finite element model. According to results, fretting fatigue lives were obtained from finite element analysis were close and had similar trend with fatigue lives obtained from the experiments.

Subject Keywords

Materials, Materials Fatigue., Keywords: Fretting fatigue, Contact mechanics, Finite element analysis, Dissimilar materials, Fatigue life.

URI

http://etd.lib.metu.edu.tr/upload/12624588/index.pdf
https://hdl.handle.net/11511/44627

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Theoretical prediction of bulk glass forming ability (BGFA) of Ti-Cu based multicomponent alloys SUER, Sila; Mehrabov, Amdulla; Akdeniz, Mahmut Vedat (Elsevier BV, 2009-03-01) The bulk glass forming ability (BGFA) of Ti-Cu based multicomponent alloys has been evaluated via theoretical modeling and computer simulation studies based on a combination of electronic theory of alloys in the pseudopotential approximation and the statistical thermodynamical theory of liquid alloys The. magnitude of atomic ordering energies, calculated by means of the electronic theory of alloys in the pseudopotential approximation, was subsequently used for calculation of the key thermodynamic parameters...
Experimental and numerical investigation of fretting failure in lug-bush members under cyclic loading Özen, Emine Burçin; Çöker, Demirkan; Department of Aerospace Engineering (2021-7) In this study, experimental and numerical work to investigate the mechanisms occurring at the contact region of the lug-bush members under cyclic loading are presented. Post-mortem macroscopic and microscopic investigations of the mating lug and bush surfaces are conducted using digital microscope and scanning electron microscope. The black-brown residues observed at the mating surfaces are shown to be tribolayer regions using energy dispersive spectroscopy analysis. Locations of sliding regions at the cont...
Experimental and theoretical study on elastic properties of crystalline alkali silicate hydrate Moon, Juhyuk; Kim, Seungchan; Akgül, Çağla; Bae, Sung-Chul; Clark, Simon Martin (Elsevier BV, 2020-01-05) Mechanical properties of synthesized sodium silicate mineral, Na-kanemite, was investigated by synchrotron-based high-pressure x-ray diffraction experiment and first-principles calculations. Under hydrostatic pressure, the 020 interlayer peak was substantially diffused while a new 011 peak formed at 0.4 GPa due to the reduction of Pbcn symmetry. Upon unloading, the diffused interlayer peak reappeared to its original position with a less peak intensity and the newly formed peak disappeared. This temporal but...
Investigation of photovoltaic properties of amorphous InSe thin film based Schottky devices Yilmaz, K.; Parlak, Mehmet; Ercelebi, C. (IOP Publishing, 2007-12-01) In this study, device behavior of amorphous InSe thin films was investigated through I-V, C-V and spectral response measurements onto SnO2/p-InSe/metal Schottky diode structures. Various metal contacts such as Ag, Au, Al, In and C were deposited onto amorphous p-InSe films by the thermal evaporation technique. The best rectifying contact was obtained in a SnO2/p-InSe/Ag Schottky structure from I-V measurements, while the Au contact had poor rectification. Other metal contacts (Al, In and C) showed almost oh...
Experimental and theoretical investigation of the mechanical characteristics of sillenite compound: Bi12GeO20 Sürücü, Gökhan; Işık, Mehmet; Gencer, Ayşenur; Hasanlı, Nızamı (2021-11-01) The present study reports the mechanical and elastic characteristics of Bi12GeO20 (BGO) compound by experimental nanoindentation measurements and density functional theory (DFT) calculations. X-ray diffraction pattern of BGO was plotted and revealed diffraction peaks were associated with Miller indices of cubic crystalline structure with lattice constant of a = 10.304 Å. Two- and three-dimensional representations of Young’s modulus, linear compressibility, shear modulus and Poisson’s ratio were presented ac...

Citation Formats

Y. M. Korkmaz, “Experimental and numerical investigation of the fretting fatigue of dissimilar mating surfaces,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Aerospace Engineering., Middle East Technical University, 2019.