The elasto-plastic normal contact of fractal surfaces is investigated. To study the influence of several surface parameters like fractal dimension and resolution, the surfaces are numerically generated using a special form of the structure function which is motivated by measurements of real rough surfaces. The contact simulation uses an iterative elastic halfspace solution based on a variational principle. A simple modification allows also the approximative solution of elasto-plastic contact problems. The influence of different surface parameters is studied with respect to the load-area relationship and the load-gap relationship. The simulations show that for realistic surface parameters the deformation is always in the plastic range.
Elasto-Plastic Normal Contact of Three-Dimensional Fractal Surfaces Using Halfspace Theory
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division October 16, 2002; revised manuscript received April 24, 2003. Associate Editor: M. D. Bryant.
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Willner, K. (January 13, 2004). "Elasto-Plastic Normal Contact of Three-Dimensional Fractal Surfaces Using Halfspace Theory ." ASME. J. Tribol. January 2004; 126(1): 28–33. https://doi.org/10.1115/1.1631019
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