Abstract
Knowledge of the cyclic properties of metallic materials is often critical to correctly design structural components. However, cyclic data are not easily available in the literature, while tensile test data are easier to find in specialized sites or vendor catalogs. In this study, the cyclic strength coefficient and the cyclic strain hardening exponent of the Ramberg–Osgood law were evaluated using exclusively data obtained through monotonic tensile tests. The analyses were carried out on a large set of materials. The database used is composed of 338 alloys, mainly iron alloys, but also titanium and aluminum alloys. New subdivisions of the materials were introduced. Several original relations were suggested to correlate static and cyclic strength parameters. The evaluated values of both cyclic strength coefficient and cyclic strain hardening exponent were compared with experimental values coming from cyclic test, obtaining a satisfactory agreement and a higher accuracy if compared with similar relations found in the literature.
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Abbreviations
- E :
-
Modulus of elasticity
- K′:
-
Cyclic strength coefficient
- R 2 :
-
Coefficient of determination
- R m :
-
Ultimate tensile strength
- R p :
-
Monotonic yield stress
- a, b, c :
-
Numerical constant/coefficient
- n :
-
Monotonic strain hardening exponent
- n′:
-
Cyclic strain hardening exponent
- Δε :
-
Strain range
- Δσ :
-
Stress range
- α :
-
New fracture-ductility parameter
- ε f :
-
True fracture ductility
- σ f :
-
True fracture strength
- ψ :
-
Reduction in area
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Appendix
Appendix
The numerical values of the constants that appear in the relations are listed in Table 9 according to corresponding equation number.
Data are gathered from the technical literature (Ref 10, 11, 13, 14). In particular, they are gathered from tables 1-3 in Ref 10 and from table 1 in Ref 11 (not reported here). The designations of the materials collected from Ref 13, 14 are listed in Table 10, together with the identification number reported in the online material properties database MATDAT (Ref 19).
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Zonfrillo, G. New Correlations Between Monotonic and Cyclic Properties of Metallic Materials. J. of Materi Eng and Perform 26, 1569–1580 (2017). https://doi.org/10.1007/s11665-017-2595-9
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DOI: https://doi.org/10.1007/s11665-017-2595-9