Failed Pop Rivet

A pop rivet failed while being used to hold two structural members together. A series of views of the failed pop rivet are shown below.

Overall view of failed pop rivet (mag 20x).	Close-up view of failed pop rivet (mag 35x).

The failed pop rivet exhibited a typical "cup and cone" fracture appearance. This indicated that the pop rivet failed in tension.

Overall view of failed pop rivet shank (mag 20x).	Close-up view of failed pop rivet. Note distinct "cup and cone" fracture appearance (mag 30x).

Close-up views of the "cup and cone" fracture, indicating tensile overload, are shown in photographs below.

 

Close-up view of "cup and cone" fracture (mag 40x).	Close-up view of bottom of cup fracture. Center fracture area failed in tension (mag 50x).