Explanation

The relative measurement of energy consumption and conduction of materials on force field, electric field, magnetic field, etc., is also called damping factor or loss angle tangent. For shear stress, loss factor tan δ = G "/G ', for normal stress, loss factor is the ratio of loss modulus and elastic modulus, that is, tan δ = E "/E '. If δ = 0, the force is fully and effectively used for materials deformation, without internal friction; If δ = ∞， The force is completely used to overcome the viscous resistance (internal friction) of materials. The loss angle tangent represents the energy loss of materials under dynamic deformation; The diekctric loss factor is the ratio of the imaginary part of the dielectric constant to the real part.

Classification