According to the critical plane approach, the expected fracture plane needs to be determined in order to calculate the fatigue life of a body under multiaxial random loading. As experimentally observed by many authors, the position of such plane strongly depends on the directions of the principal stresses or strains. In the present paper, the expected principal stress directions are obtained by averaging the instantaneous values of the three Euler angles through some suitable weight functions which can take into account the main factors influencing the fatigue fracture behaviour. A numerical simulation is presented to illustrate the proposed procedure.
Expected principal stress directions under multiaxial random loading through weight function method / CARPINTERI, Andrea; EWALD MACHA; BRIGHENTI, Roberto; RAFA BRYCE; SPAGNOLI, Andrea. - (1997), pp. 541-555. (Intervento presentato al convegno 5th International Conference on Biaxial/Multiaxial Fatigue and Fracture nel 8-12 Sept. 1997).
Expected principal stress directions under multiaxial random loading through weight function method
BRIGHENTI, Roberto;
1997
Abstract
According to the critical plane approach, the expected fracture plane needs to be determined in order to calculate the fatigue life of a body under multiaxial random loading. As experimentally observed by many authors, the position of such plane strongly depends on the directions of the principal stresses or strains. In the present paper, the expected principal stress directions are obtained by averaging the instantaneous values of the three Euler angles through some suitable weight functions which can take into account the main factors influencing the fatigue fracture behaviour. A numerical simulation is presented to illustrate the proposed procedure.
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