21 Oct Effects cumulation by fatigue loading with more blocks of stresses / Cumularea efectelor la solicitarea la oboseală cu mai multe blocuri de tensiuni
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Romanian Academy of Technical Sciences (ASTR) 2013The paper deals with effects cumulation in the case of a mechanical structure cyclic loaded with blocks of different stresses. The most known relationships proposed in literature for this loading case, are empirical, refers to linear-elastic behavior of the material; they do not take into account the influence of mean stress, of load rate and deteriorations. In this paper one proposes a general relationship for the effects accumulation, due to cyclic loading with several blocks of normal stresses, in the case of nonlinear behavior of the structure material.