What is the primary concern when determining edge distances for rivets?

The primary concern when determining edge distances for rivets is load distribution. Edge distance refers to the distance from the center of a rivet to the nearest edge of the material it is securing. Proper edge distance is critical for effective load transfer between the rivet and the material. If the edge distance is too small, the rivet may not be able to adequately support the load, which can lead to issues such as rivet failure, material cracking, or deformation of the structure. This concern is particularly important in aircraft structures where safety and structural integrity are paramount.

In addition, appropriate edge distances help prevent the material surrounding the rivet from being overloaded, which can lead to premature failure or reduced structural performance. Therefore, ensuring the correct load distribution through proper edge distances is essential in maintaining the integrity and functionality of the aircraft's structural components.