IDENTIFYING FRACTURE SURFACE CHARACTERISTICS FOR SHAFTS

Using the chart of fracture surface appearance, which is repeated in larger size on this page (click on the thumbnail pictures to bring up higher resolution images), identify the type of load, nominal stress and stress concentration level for the two shaft examples given.



Shaft Failure 1 : Failure from pinion gear keyway


Shaft Failure 2 : Failure between double-helical gears (final fracture between arrows).

Chart of fracture surface appearance

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