Factors to consider

• Core Material

  • Aluminum Honeycomb

  • Nomex Honeycomb

• Face sheet materials

  • 4 ply either side, should we use Kevlar or Fiberglass for inner layer (galvanic)

  • In areas 500mm from driver, do we want to add more layers when adding the Kevlar or remove some layers

• Adhesive

  • Co-bond using West Systems

  • Co-bond using Lam 127

  • Secondary bond using West Systems

  • Secondary bond using Lam 127

  • Secondary bond using Araldite

  • Secondary bond using paste epoxy

• Filler materials

  • This would be for secondary bond epoxies, especially paste epoxies, in order to get ideal bond thickness (4-8 thou)

  • This has the potential to strengthen our panels but I have no research to back this up (it just makes sense kinda… right?) and it would have to be completely empirical

• Kevlar fiber interfacial toughening (Kevlar Fiber interfacial toughening)

First test plans

Test all with fiber glass as inner layer first, then kevlar

Volume fraction around 55%(will test)

For now, all tests will be 3 ply cf, Kevlar/fiber glass, core, kevlar/fiberglass, 3 ply cf

• Orientation will be 0, 45, -45, 90

Nomex core test group:

Honeycomb properties

• cell size: 3/16 inch

• density: 6 lb/ft^3

• thickness: 20 mm

Aluminum test group:

Honeycomb properties

• cell size: 1/2 inch

• density: 0.000752 - 0.0994 lb/in³

• thickness: 3/4 inch