Modelling of patterned fibre constrained layer damping for composite materials
Invited paper
University of Canterbury
Tuesday 2 june, 2015, 09:20 - 09:40
0.1 London (90)
Abstract:
Vibration damping is an important consideration in the design of fibre
reinforced composite structures as these stiff, lightweight materials often
have undesirable vibration transmission characteristics. If not properly
addressed, high vibration levels can propagate throughout a structure and
result in undesirable conditions for occupants and equipment. It is possible
to incorporate viscoelastic damping layers into a composite laminate's
construction to achieve improved damping properties. Inclusion of embedded
viscoelastic layers results in a constrained layer damping configuration,
where the damping capacity is governed by the shear strain in the damping
layer. Deliberate asymmetry in orthotropic layers surrounding a viscoelastic
core can be used to induce coupling between normal and shear effects. A finite
element model is presented to investigate the effect of patterned fibre
constraining layers on the damping performance of these constrained layer
materials.