1983-02-01
Fatigue Life Prediction Scheme for Carburized Members Subjected to ln-Phase Multiaxial Stresses 830635
A dimensionless fatigue life parameter 
is developed for the correlation of fatigue data of carburized and core material. It is shown that the Smith-Watson-Topper parameter (E σmax ɛa)½ can be generalized to the form 
to account for the fatigue strength differentials of dissimilar materials such as the core and case-core interface. Fatigue data generated using circumferentially notched specimens (Kt = 1.46 and Kt = 2.22) was successfully correlated to the core material fatigue data using this parameter at low stresses. From these observations, a scheme is proposed to predict low-stress fatigue life of a carburized member experiencing multiaxial stresses based on the core material fatigue response only.
is developed for the correlation of fatigue data of carburized and core material. It is shown that the Smith-Watson-Topper parameter (E σmax ɛa)½ can be generalized to the form to account for the fatigue strength differentials of dissimilar materials such as the core and case-core interface. Fatigue data generated using circumferentially notched specimens (Kt = 1.46 and Kt = 2.22) was successfully correlated to the core material fatigue data using this parameter at low stresses. From these observations, a scheme is proposed to predict low-stress fatigue life of a carburized member experiencing multiaxial stresses based on the core material fatigue response only.SAE MOBILUS
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