Affiliation:
1. Department of Chemical and Materials Engineering Pontifical Catholic University of Rio de Janeiro (PUC‐Rio) Rio de Janeiro Brazil
2. Faculdade de Tecnologia, Campus Universitário Darcy Ribeiro, Department of Mechanical Engineering University of Brasilia (UnB) Brasília Brazil
3. Department of Civil Engineering Fluminense Federal University (UFF) Niterói Brazil
Abstract
AbstractA direct relation where fatigue life
can be determined as a function of macroscopic normal and shear stress amplitudes
and
is established. Using the Carpinteri & Spagnoli (C&S) criterion as a survey tool, elliptical‐level curves in the
domain were revealed and further generalized, providing means to determine
for any given
combination. Predictions obtained through the elliptical curve method (E) were compared with experimental observations, as well as with predictions obtained from adapted versions of popular fatigue criteria, namely, Findley (F), Matake (M), McDiarmid (McD), Susmel & Lazzarin (S&L), C&S, and Papadopoulos (P). The proposed model delivered predictions in fair agreement with experimental observations, and its predictive capability was seen to be the best among all the considered criteria. Finally, a slight bias toward conservativeness was attenuated with the introduction of an adjusting parameter, further improving the predictive capability of the model.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science