Estimated Young's Modulus of Finished Brake Pads using Ultrasound
This SAE Recommended Practice specifies a method for testing and measuring an estimated Young's modulus of brake pad assemblies using ultrasound. This RP applies to disc brake pad assemblies and its coupons or segments used in road vehicles.
Rationale: The Young's modulus of a brake lining is an important design parameter when evaluating brake fluid volume consumption, brake pedal travel, or the propensity of a brake system to generate roughness (low frequency vibration) or noise. A brake linings Young's is also useful for lining characterization and quality control. The purpose of this series of test procedures is to evaluate the estimated Young's modulus of disc and its assemblies.