Variation in Cyclic Deformation and Strain-Controlled Fatigue Properties Using Different Curve Fitting and Measurement Techniques University of Toledo

Format:

Conference/Event

Author/Creator:

Roessle, Matthew L., author.

Conference Name:

International Congress & Exposition (1999-03-01 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1999

Summary:

The strain-life approach is now commonly used for fatigue life analysis and predictions in the ground vehicle industry. This approach requires the use of material properties obtained from strain-controlled uniaxial fatigue tests. These properties include fatigue strength coefficient (σf), fatigue strength exponent (b), fatigue ductility coefficient (εf), fatigue ductility exponent (c), cyclic strength coefficient (K), and cyclic strain hardening exponent (n). To obtain the aforementioned properties for the material, raw data from stable cyclic stress-strain loops are fitted in log-log scale. These data include total, elastic and plastic strain amplitudes, stress amplitude, and fatigue life. Values of the low cycle fatigue properties (σf, b, εf, c) determined from the raw data depend on the method of measurement and fitting. This paper examines the merits and influence of using different measurement and fitting methods on the obtained properties. To evaluate the effect of variations in properties on fatigue life, life predictions were performed on the SAE keyhole specimen subjected to the transmission load history

Notes:

Vendor supplied data

Publisher Number:

1999-01-0364

Access Restriction:

Restricted for use by site license