Methodology of porosity modeling for friction pad: Consequence on the squeal instability

Vincent Magnier (1) , J.B. Colliat , P. Dufrénoy

1 Université de Lille

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 homog-enized 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 .

Mots clés: Finite Element Analysis; Morphological modeling; Squeal; Heterogeneous material

Domaines: Mécanique [physics.med-ph]; Mécanique des matériaux [physics.class-ph]

Vincent Magnier, J.B. Colliat, P. Dufrénoy. Methodology of porosity modeling for friction pad: Consequence on the squeal instability. Tribology International, 2017, 109, pp.78 - 85. ⟨10.1016/j.triboint.2016.12.026⟩. ⟨hal-01737147⟩