A composite material is any material in which two or more separate materials have been combined to make a single construct having more desirable properties. Composites are probably the most common structural materials in the world, and have always been an essential part of our lives.
Concrete, paper, corrugated cardboard, plywood, fiberglass, bamboo, cornstalks, trees, bricks… all are composite materials. Far from being a new invention, composite materials are the main structural elements of nature. Take a close look at the grain and structure of a piece of wood, and you will see how its strength comes from a structure of fibers bound together side by side.