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2 Polish Maritime Research

2 Kolenda J.

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High-cycle fatigue criterion for anisotropic metals under multiaxial constant and periodic loads

Kolenda J.

Polish Maritime Research

2005

nr 4

10-14

Periodic stress with Cartesian components given in the form of Fourier series is considered. To account for the mean stress effect the modified Soderberg's formula is employed. An equivalent stress with synchronous components is defined. The design criterion for a finite fatigue life of metal elements is formulated. It covers the conditions of both static strength and fatigue safety in the high-cycle regime and includes material constants which have simple physical interpretation, can be determined by uniaxial tests, are related directly to the applied loads, and can reflect material anisotropy.

Fatigue "safe-life" criterion for metal elements under multiaxial constant and periodic loads

Kolenda J.

Polish Maritime Research

2004

nr 2

23-26

Periodic stress with Cartesian components given in the form of Fourier series is consideŹred. To account for the mean stress effect the generalised Soderberg criterion for ductile materials is employed. An equivalent stress with synchronous components is defined by means of the equivalence conditions based on the average strain energy of distortion. The fatigue "safe-life" design criterion is formulated which covers the conditions of both static strength and fatigue safety and includes material constants that have simple physical inŹterpretation, can be determined by uniaxial tests, are related directly to the applied loads and can reflect material anisotropy.