Purdue University

Purdue University

Mechanical Engineering
Tribology Laboratory

Finite Element Modeling of Fretting Wear

Sina Moghaddam

Fatigue cracks usually initiate from clamped or bolted parts that experience vibration or any other type of oscillatory motion and loading. Surface degradation caused by these conditions constitutes in fretting fatigue.

In this study, Finite Element Method (FEM) is used to investigate the effect of reciprocal motion on random domains with different values of grain boundary size and surface roughness. Both commercially available softwares (ABAQUS) and finite element codes developed by METL stuff are used for this analysis.

Models with different surface roughness values are created to investigate the difference in their response to loading and reciprocal motion under flat-flat and Hertzian contacts. The focus of the research is on the elastic behavior of the material. In Figure-1 you can see some sample results.


Figure 1- Hertzian pressure distribution for two random surfaces with different values of surface roughness

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