What is the function of a gusset or gusset plate in aircraft structures?

A gusset or gusset plate serves the primary function of joining and reinforcing intersecting structural members in aircraft structures. This component is crucial because it helps to distribute loads and stresses more evenly across the joints where different structural elements come together. By enhancing the strength and stability of these connections, gussets can improve the overall structural integrity of the aircraft.

When structural members, such as beams or fuselage sections, meet at an angle or intersect, a gusset plate provides additional support that helps prevent buckling and distortion under load. This is particularly important in aerospace applications, where safety and durability are paramount.

While reducing weight can be an advantage of thoughtful design, it is not the main function of gussets. Thermal insulation is not relevant since gusset plates are typically made from metal and do not serve to insulate against temperature changes. Although gussets can assist in load-bearing by improving the connection between members, their primary role is about joining and reinforcing, rather than acting solely as structural supports.