Fatigue Life Estimation under Cyclic Loading Including Out-of-Parallelism of the Characteristics

Author:

Kurek Marta1,Łagoda Tadeusz1

Affiliation:

1. Opole University of Technology

Abstract

The paper presents an algorithm of fatigue life determination for materials with no parallel fatigue characteristics under pure bending and pure torsion. The presented model uses the iteration method, and the applied fatigue criterion is function of the ratio of normal and shear stresses coming from bending and torsion, respectively. Three materials were applied for analysis: CuZn40Pb2 brass, 30CrNiMo8 medium-alloy steel and 35NCD16 high-alloy steel.

Publisher

Trans Tech Publications, Ltd.

Reference16 articles.

1. Gough H.J.: Some Experiments on the Resistance of Metals to Fatique under Combined Stresses, London: His Majesty's Stationery Office (1951).

2. Nishihara T, Kawamoto M.: The strength of Metals under Combined Alternating Bending and Torsion with Phase Difference. Memoirs of the College of Engineering, Kyoto Imperial University, Vol. X, No. 6 (1941).

3. Lee S.B.: A criterion for fully reversed out–of–phase torsion and bending, Multiaxial fatigue ASTM STP 853, Philadelphia (1985), p.553–568.

4. Findley W.N.: A theory for the effect of mean stress on fatigue of metals under combined torsion and axial load or bending, Journal of Engineering for Industry, (1959), p.301–306.

5. McDiarmid D.L.: Fatigue under out–of–phase bending and torsion, Fatigue Fract. Engng Mater. Struct., Vol. 9, No. 6, (1987), p.457–475.

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