A Review of Theories on Constrained Layer Damping and Some Verification Measurements on Shim Material Meneta Advanced Shims Technology A/S

Format:

Conference/Event

Author/Creator:

Flint, John, author.

Conference Name:

21st Annual Brake Colloquium & Exhibition (2003-10-19 : Hollywood, Florida, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

Introducing a rubbercoated steel plate - a shim - on the backing plate of a brake pad often solves squeal problems in disc brakes. This may be attributed to one or more of several effects exerted by the shim:The effect of damping may be active in either or both of the following ways:This paper will deal with the constrained layer damping effect introduced by applying a viscoelastic material and an additional steel plate on top of the backing plate. This paper reviews some theories on constrained layer damping and extracts information on the effect of varying important parameters such as layer thickness, stiffness of the constrained material et cetera Measurements on specially designed damping materials are performed in order to verify the predictions of the theories, and finally measurements on a commercial available shims material are presented. The measurements are made with the conventional half power bandwidth method' on a specially designed plate that behaves like a beam in the frequency range of interest. The theory on constrained layer damping predicts important properties that are relevant for the application of shims material and the measurements shows a qualitative agreement with the predictions

Notes:

Vendor supplied data

Publisher Number:

2003-01-3321

Access Restriction:

Restricted for use by site license