What is generally a critical factor when determining the performance of a riveted joint in stressed metal structures?

The performance of a riveted joint in stressed metal structures hinges significantly on the condition of the rivet during installation. When rivets are installed, the technique used, including factors like the amount of force applied and the temperature, can greatly influence the integrity and strength of the joint. If a rivet is not properly installed—whether through inadequate squeezing, improper heating, or insufficient buckling—it can lead to issues such as misalignment, weak connections, or even failure under load.

The installation process is crucial because it determines how the rivet will deform to fit the materials being joined. If the rivet is in a poor condition or inadequately installed, there can be a loss of the intended clamping force that holds the materials together. Consequently, this affects the joint's overall load-bearing capacity and resistance to fatigue, making the installation condition a critical factor in its long-term performance.

While weight of the structure, tightness of the fit, and the material type of the rivet also play roles in overall joint effectiveness, these factors are either influenced by the installation process or are secondary to how well the rivet is placed to begin with. The condition of the rivet during installation directly affects the connection's reliability and strength in service.