What must be considered regarding rivets used in composite structures?

The correct consideration regarding rivets used in composite structures revolves around the concept of delamination. Composite materials, such as carbon fiber reinforced polymers, have distinct layers, and the application of rivets can exert significant forces that may lead to separation between these layers if not properly managed. This delamination can compromise the structural integrity and performance of the composite material.

Choosing the right type of rivet, along with proper placement and installation techniques, is essential to prevent such issues. Factors like the materials used in the rivets, the design of the joint, and the load distribution can all influence whether delamination occurs. Hence, attention must be paid to those aspects when working with rivets in composite structures.

The other options do not accurately represent the specific considerations regarding rivet use in composite structures. For example, rivets do not have to be made of aluminum specifically, and while lightweight materials are generally desirable, the emphasis on preventing delamination is paramount. Additionally, claiming that rivets are not needed in composite structures overlooks their potential applications for joining components, which can be critical for certain designs.