Honeycomb and Filament Winding

Honeycombed structure

-Hexagonal geometry of a honeycomb

-Allows minimum material, minimum weight, minimum cost of material

Sandwich Panel

honeycomb core is bonded to a tom and bottom sheet

Expansion

several layers of sheets are glued and then expanded (polymer or paper materials)

Corrugation

Each sheet is fed between corrugation rolls and then the sheets are bonded together (for aluminum)

Sandwich structure

consists of two thin, stiff and strong faces separated by a relatively thick lightweight core
Core

- Balsa wood

- Foam cores

- Lightweight

- Have high stiffness

- Cost effective compared to other composite structures

Important characteristics of sandwich structure

- High compression strength

- higher than other sandwich core structures such as foam or corrugated cores

Advantages of Honeycomb

Filament Winding

– fabrication technique mainly used for manufacturing open (pipes, cylinders) or closed end structures

- involves winding filaments under tension over a rotating mandrel.

- filaments: glass or carbon coated in bath with resin to cover the mandrel, then cured (hardened)