Flexural Effects in Disc Brake Pads

Details of the automobile disc brake are outlined, leading to the flexural requirements and construction of friction pad assemblies. A theoretical treatment of these is given, introducing the concept of a critical length which influences pressure distribution and reliability. A simple experiment which illustrates the critical length effect is described, with details of the experimental and theoretical correlation. The finite element technique is applied in a computer study of the structural behaviour of pad assemblies when subjected to various loads. Effects of load distribution, pad compression and backplate rigidity are discussed in the context of specific operational problems.