Modelling of patterned fibre constrained layer damping for composite materials
University of Canterbury
Tuesday 2 june, 2015, 09:20 - 09:40
0.1 London (90)
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.
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