Title

Fractal Geometry Model for Wear Prediction

Abstract

Fractal characterization of surface topography is applied to the study of contact mechanics and wear processes. The structure function method is used to find the fractal dimension D and the topothesy L. We develop a fractal geometry model, which predicts the wear rate in terms of these two fractal parameters for wear prediction. Using this model we show that the wear rate Vr and the true contact area Ar have the relationship Vr?Arm(D), where m(D) is a function of D and has a value between 0.5 and 1. We next study the optimum (i.e. the lowest wear rate) fractal dimension in a wear process. It is found that the optimum fractal dimension is affected by the contact area, material properties and scale amplitude. Experimental results of wear testing show good agreement with the predictions based on the model.

Department(s)

Mechanical and Aerospace Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1993 Elsevier, All rights reserved.

Share

 
COinS