Matjaž Šraml (Author), Jože Flašker (Author), Iztok Potrč (Author)

Abstract

A computational numerical model for contact fatigue damage analysis of mechanical elements is presented in this paper. The computational approach is based on continuum mechanics, where a homogenous and elastic material model isassumed in the framework of the finite element method analysis. Cyclic contact loading conditions are simulated with moving Hertzian contact pressure. The time-depending loading cycles are defined for each observed material point on and under the contact area. Furthermore, the influence of friction upon rolling-sliding contact loading cycles is analysed in detail, using Coulombćs friction law. The model for prediction of the number of loading cycles, required for initial fatigue damages to appear, is based on Coffin-Manson relations between deformations and loading cycles, and includes characteristic material fatigue parameters. As a general example, the model isused to analyse a fundamental contact problem of a cylinder and flat surface, which is usually a substitutional model for analysing real mechanicalproblems. However, the results concerning the identification of critical material points and the number of loading cycles, required for initial fatigue damages to appear at those points, are the main purpose of thepresented study.

Keywords

strojni elementi;zobniška gonila;kontaktni problemi;kontaktna utrujenost;začetek razpoke;numerično modeliranje;machine elements;gears;contact problems;contact fatigue;crack initiation;numerical modelling;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
UDC: 621.833:539.388.1
COBISS: 7911702 Link will open in a new window
ISSN: 0142-1123
Views: 1446
Downloads: 69
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Other data

Secondary language: English
Secondary keywords: strojni elementi;zobniška gonila;kontaktni problemi;kontaktna utrujenost;začetek razpoke;numerično modeliranje;
URN: URN:SI:UM:
Pages: str. 585-595
Volume: 25
Issue: 7
Chronology: 2003
ID: 8718832