An approach to study the contact analysis of drum brake squeal noise is presented based on three-dimensional Finite Element analysis using Ansys Program. The effect of friction material compressibility, coefficient of friction, and line pressure on the interface contact is examined. The modal analysis of the vehicle drum brake is also studied to get the natural frequency and instability of the drum. It is shown that the Unsymmetric modal analysis is efficient enough to solve this linear problem after transforming the non-linear behaviour of the contact between the drum and the friction material to a linear behaviour. A linear element which is Matrix27, used in the modal analysis is transferred to non-linear elements which are Targe170 and Conta173 to study the contact analysis. The contact problems are highly non-linear and require significant computer resources to solve it, however, the contact problem give two significant difficulties. Firstly, the region of contact is not known based on the boundary conditions, line pressure, and drum and friction material specifications. Secondly, these contact problems need to take the friction into consideration. The modes of the coupled drum brake system contain complex numbers, which have real and imaginary parts. The contact stiffness affects the squeal of the coupled drum brake system. Low or high stiffness could lead to convergence difficulties. Distribution of the nodal reaction force depends mainly on piston load and also affects the wear that happen either in the center or on the edges of the linings. More adequate stiffness leads to less squeal probability. Compressibility of the pad back-plat could affect the distribution of the load on the contact nodes.
Studying the contact analysis behavior of vehicle drum brake using finite element methods
Untersuchung des kontaktanalytischen Verhaltens von Fahrzeugtrommelbremsen mit der Finite-Elemente-Methode
2006
10 Seiten, 15 Bilder, 2 Tabellen, 17 Quellen
Aufsatz (Konferenz)
Englisch
Studying the Contact Analysis Behavior of Vehicle Drum Brake Using Finite Element Methods
SAE Technical Papers | 2006
|British Library Conference Proceedings | 2006
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