Bolt Behavior No. 2

In the previous issue we dealt with the fact that bolts can withstand significantly less cyclic loading than steady loading. We are now looking at the mechanics of why bolts fail if flanges are allowed to separate during operation.

A flat faced flange connection is shown in section in Drawing I. It is somewhat exaggerated to more clearly illustrate the principle. This is the kind of connection that would be used in a cyclic loaded strut member. The same type joint is typically used when a compressor or power cylinder is mounted to the crankcase of large stationary equipment.

Drawing I