Methodology of porosity modeling for friction pad: Consequence on squeal

• Published in: Tribology international Vol. 109; no. 78-85; pp. 78 - 85
• Main Authors: Magnier, V., Roubin, E., Colliat, J.B., Dufrénoy, P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2017; Elsevier BV; Elsevier
• Subjects: Engineering Sciences; Finite Element Analysis; Finite element method; Friction; Heterogeneous material; Mechanical properties; Morphological modeling; Morphology; Porosity; Squeal; Studies; Tribology; X-rays; Squeal; Heterogeneous material; Finite Element Analysis; Morphological modeling
• ISSN: 0301-679X; 1879-2464
• DOI: 10.1016/j.triboint.2016.12.026

Mechanical property is an important parameter of friction material as it influences contact distribution (tribological and thermo-mechanical behavior), dynamic behavior (and then squeal propensity). Due to the process, the percentage of porosity in the volume is near 10%. So, a friction pad has been characterized by a topographical study using X-ray. This step permits to obtain some information concerning the porosity. In a second step, a simplified pin-on-disc is modeled using finite element method considering initially homogenized friction material and secondly heterogeneous friction material including the pores. The pore distributions are generated using a representative random fields technique. The introduction of pores shows clearly some differences on dynamical behavior between homogenized and heterogeneous materials consideration. •Characterization of friction material using X-ray microtomography.•Using morphological modeling to generate porosities in model.•Influence of porosities on modal analysis on a pin-on-disc system.•Explanation of the influence of porosities on the modal analysis.