As has been observed experimentally by many authors, the position of the fatigue fracture plane appears to strongly depend on the directions of the principal stresses or strains. In Part I of the present work the expected principal stress directions under multiaxial random loading are theoretically obtained by averaging the instantaneous values of the three Euler angles through some suitable weight functions which are assumed to take into account the main factors influencing fatigue behaviour. Then, in Part II, it is examined how such theoretical principal directions determined by applying the proposed procedure are correlated to the position of the experimental fracture plane for some fatigue tests reported in the literature.
Expected principal stress directions under multiaxial random loading - Part I: Theoretical aspects of the weight function method / Carpinteri, Andrea; Ewald, Macha; Brighenti, Roberto; Spagnoli, Andrea. - In: INTERNATIONAL JOURNAL OF FATIGUE. - ISSN 0142-1123. - 21:(1999), pp. 83-88. [10.1016/S0142-1123(98)00046-2]
Expected principal stress directions under multiaxial random loading - Part I: Theoretical aspects of the weight function method
CARPINTERI, Andrea;BRIGHENTI, Roberto;SPAGNOLI, Andrea
1999-01-01
Abstract
As has been observed experimentally by many authors, the position of the fatigue fracture plane appears to strongly depend on the directions of the principal stresses or strains. In Part I of the present work the expected principal stress directions under multiaxial random loading are theoretically obtained by averaging the instantaneous values of the three Euler angles through some suitable weight functions which are assumed to take into account the main factors influencing fatigue behaviour. Then, in Part II, it is examined how such theoretical principal directions determined by applying the proposed procedure are correlated to the position of the experimental fracture plane for some fatigue tests reported in the literature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.