Accession Number : AD0780120

Title :   Cyclic Inelastic Deformation and Fatigue Life Behaviour of Notched Components.

Descriptive Note : Interim rept.,


Personal Author(s) : Leis,B. N. ; Topper,T. H. ; Gowda,C. V. B.

Report Date : APR 1974

Pagination or Media Count : 41

Abstract : Cyclic inelastic deformation response and fatigue notch factor are presented and discussed for two metals of contrasting stress-strain behaviour (an aluminum alloy 2024-T351 and a mild steel SAE 1015). Thin circular or elliptical notched plates fabricated from these metals were subjected to cyclic straining in a servo-controlled testing machine. Results of these tests are discussed in terms of cyclic stress and strain concentration factors and related to notch plate deformation through a parameter derived fron Neuber's rule. The results indicate that the deformation analysis employed, rather than a material 'size effect' is responsible for values of K sub f less that K sub t. (Author)

Descriptors :   *Fatigue(Mechanics), *Plastic deformation, Notch sensitivity, Aluminum alloys, Steel, Stress strain relations, Cycles, Canada

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE