What Is the Role of Epoxy in the Structure of a 3D Phononic Crystal?

[germaine]

the description :
"in 3D phononic crystal constitued of lead spherical inclusions on a face-centered cubic lattice embidded in an epoxy matrix"

The problem i don't understand:the position of the lead spherical inclusions.
What is the epoxy matrix, is it relative to the fcc lattice ?

Do I describe my question clearly?
Thank you...

 

[Dr Transport]

lead sheres in a surrounding marix: think of spheres in jello in a regular array.

 

[Gokul43201]

the description :
"in 3D phononic crystal constitued of lead spherical inclusions on a face-centered cubic lattice embidded in an epoxy matrix"

The problem i don't understand:the position of the lead spherical inclusions.
What is the epoxy matrix, is it relative to the fcc lattice ?

Do I describe my question clearly?
Thank you...

No, you have not described your question clearly!
1. Where is this quote taken from?
2. What is the complete context?

The idea behind a phononic crystal is to create a (Bravais) lattice of variations in density and elastic modulus. Your particular lattice (Chandra, et al) is made up of spherical Pb inclusions which are arranged periodically in a chunk of epoxy. The positions of the spheres make up an FCC lattice. I imagine (and this is nothing more than a guess) you could start with a bunch of tiny Pb balls, which you first arrange in a close-packed structure, and then fill the spaces between the balls with an epoxy resin that can be cured afterwards.