To fully understand the term composite structure you should know two things: what is composite material and what is structure; because composite structures are simply the structures made by composite materials.
The world of composites is extremely vast and diverse. It is not only about a fancy engine cover on a sports car. We encounter composite structure in our everyday lives: when a bicycle passes us by, when we look up in the air and we spot a plane, and also at home, when we stand on them while taking a shower.
The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionized traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction.