Which materials can be used as facings and cores in bonded honeycomb structures?

Bonded honeycomb structures are designed to provide a high strength-to-weight ratio and are commonly used in aerospace applications due to their excellent structural properties. The facings of a honeycomb structure are usually made from materials that can offer strength and stiffness, while the core provides support and lightweight properties.

Plywood, glass, nylon, and cotton cloth are suitable materials for both facings and cores in these structures. Plywood offers high strength and is relatively lightweight, making it an effective facing material. Glass can provide both strength and rigidity, making it an excellent choice for facings as well. Nylon, being a synthetic polymer, can also serve as a lightweight and strong option for the core materials. Cotton cloth, while not as common as synthetics, can be used due to its strength when layered appropriately.

In contrast, other options listed do not incorporate materials that are particularly effective. For instance, stainless steel and aluminum, while strong, do not typically serve well as core materials due to their weight. Plywood, glass, and cotton cloth are great for facings, but this combination lacks other effective core materials like nylon. Plastic and rubber materials generally do not provide the necessary structural integrity or rigidity needed for either the facing or core in bonded honeycomb constructions