The photographs on the next page show a bicycle crank. The end of the crank has suffered a fatigue failure where the pedal was screwed into the crank Ithe pedal is missingl. In the close-up photograph...

The photographs on the next page show a bicycle crank. The end of the crank has suffered a fatigue failure where the pedal was screwed into the crank Ithe pedal is missingl. In the close-up photograph of the fracture, the bottom of the photograph corresponds to the outside (pedal sidel of the crank arm.