Numerical simulation of typical contact situations of brake friction materials |
| |
Authors: | A.I. Dmitriev,W. Ö sterle |
| |
Affiliation: | a Institute of Strength Physics and Materials Science, Tomsk, Russia b Federal Institute for Materials Research and Testing, Berlin, Germany |
| |
Abstract: | In the paper, a model typical for contact situations of automotive brakes is established based on the method of movable cellular automata. The processes taking place at local contacts in an automotive brake system are analysed. Based on microscopic and micro-analytical observations, the following contact situations were simulated: (i) a couple of ferritic steel against pearlitic steel, both covered by an oxide layer mixed with graphite nanoparticles and (ii) the same situation but without oxide layers. The results of calculated mean coefficients of friction of the oxide-on-oxide contact correspond well to expected values for a real braking system, whereas steel-on-steel contact are twice as high. This allows one to make some conclusions; for example, oxide formation will take place more quickly than friction layer elimination, and finally this is responsible for the stabilisation of the coefficient of friction. |
| |
Keywords: | Friction Primary contact Automotive brake system Numerical simulation Method of movable cellular automata |
本文献已被 ScienceDirect 等数据库收录! |
|