Joggles in removed rivet shanks would indicate partial?

Joggles in removed rivet shanks are indicative of shear failure. This type of failure occurs when forces are applied parallel to the surface of a material, leading to the material being sliced or sheared apart. When rivets are subjected to shear loads — common in applications where they hold two or more parts together under tension or stress — the rivet shank can exhibit deformation in the form of joggles. These joggles appear as bends or irregularities in the otherwise straight rivet shank.

In the context of rivets, when there is an excessive shear load, it can cause the rivet to fail at its weakest point, often resulting in a joggle as the material yields to the load before ultimately breaking. This is crucial for aircraft construction and maintenance, as recognizing shear failure can help assess the integrity of the structures the rivets are securing and ensure safety in flight.

Understanding this failure mechanism is important for anyone involved in aircraft repair and maintenance, as it informs practices for inspecting rivets and ensuring that they are applied and maintained in ways that mitigate such failures.