# optimization of carbon-epoxy plates with a viscoelastic layer

[[Article_Taylor_and_Francis_vfinal.pdf|ref]]

**basis of the work**

*both experimental and numerical analyse*

This papers explore the use of [[PCLD]], its goal is to optimise the damping (of the dynamic response) from the [[Viscoelasticity|viscoelastic]] layer while keeping some stiffness (at least half of the undamped plate), by studying the size and placement of the bridges between the two external layers of carbon-epoxy.

The bridges are made by puncturing the viscoelastic layer with holes so that some of the epoxy matrix fills them.

The simulations where made using the finite element model, with 2D elements for the carbon-epoxy layers and 3D elements with a [[Neo Hookean Behavior Law|neo-hookean visco-hyper-elastic behavior law]] for the inserted layer. The simulations are accurate with the experiments.

The paper also points out an issue with the manufacturing of the bridges : the epoxy does not fill the holes fully, so there are bubbles or gaps, diminishing the properties of the material.