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Influence of the variability of automotive brake lining surfaces on squeal instabilities

Abstract : This work concerns the modelling of the variability of automotive brake liningsurfaces, and has for main purpose the improvement of the predictive aspect of finite element model dealing with the study of dynamic instabilities leading to squeal. The study of the variability is done considering the description and the evolution of the surfaces in contact. An experimental statistical analysis of several brake pads, following four different wear programs, allows the development of a non-deterministic description of the surfaces in contact. This description brings into play either random fields for the modelling of the surfaces topography modelling, or random parameters for the modelling of contact laws, lining structure and tribological behaviour. A local rubbing model considering pressure, temperature and slipping velocity is suggested. Moreover, realistic pressure distributions are achieved. Afterwards, the method given is assessed for two different industrial braking systems, with two different squeal behaviours. The results of a preliminary vibratory and acoustic series of tests, by means of Laser vibrometry and acoustic holography, allow to check and to adjust the quality of the finite element models. The consequences of the surfaces variability on the squeal is examined on test benches, and then simulated with the frequency analysis method. Comparisons with experimental results confirm the capacity of the methodology to analysis the impact of the pad-to-disc interface evolutions on the squealing behaviour of complex brake systems. The methodology capacity for checking the impact of the pad-disc interface evolution on the squeal behaviour of complex braking systems is confirmed by comparisons.
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Submitted on : Monday, September 27, 2021 - 4:13:55 PM
Last modification on : Friday, March 11, 2022 - 12:16:02 PM

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  • HAL Id : tel-03355972, version 1


Arnaud Heussaff. Influence of the variability of automotive brake lining surfaces on squeal instabilities. Mechanics []. Université de Valenciennes et du Hainaut-Cambrésis, 2012. English. ⟨NNT : 2012VALE0028⟩. ⟨tel-03355972⟩



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