SAE J3130-2023 - Std. & Spec

Scope: This SAE Recommended Practice describes a laboratory test procedure for measuring the composite loss factor and bending stiffness properties of a system consisting of a damping material bonded to a vibrating bar which is excited at the center. The bar could be a steel, aluminum, glass, or other metal or composite bar that would be used in ground vehicles, marine products, and aircraft. The damping materials could be homogeneous, nonhomogeneous, a combination of homogeneous and nonhomogeneous, used in conjunction without or with an inelastic material (such as aluminum foil) in an extensional layer or a constrained layer configuration. The damping material could be a heat bondable material, adhesive backed sheet material, sprayable coating material, or other kinds of viscoelastic materials. The damping procedure discussed here provides means to measure damping over a range of frequencies and temperatures found applicable and useable for different transportation systems.

SAE J3130-2023 history

1970 SAE J3130-2023 Laboratory Measurement of Vibration Damping Properties Using Mechanical Impedance Method at the Center of a Bar