730 B
730 B
(Secondary articles descriptions#Passive Constrained Layer Damping, SotA)
Passive Constrained Layer Damping
Viscoelasticity dissipate energy under a transient deformation. Used in a form of a layer that is either freely attached (UCLD ie unconstrained layer damping) or in a sandwich (CLD/PCLD ie constrained layer damping/passive constrained layer damping).
In most of the analyses, extensional/compressional strains of the viscoelastic layer are not taken into account since the damping comes mostly from the shear strain. However, with a thick layer, compressional damping cannot be neglected.
The mathematical models are either Finite element method or analytical.