Sm. Tipton et Dv. Nelson, ADVANCES IN MULTIAXIAL FATIGUE LIFE PREDICTION FOR COMPONENTS WITH STRESS-CONCENTRATIONS, International journal of fatigue, 19(6), 1997, pp. 503-515
Methodologies for predicting the multiaxial fatigue life of notched co
mponents are reviewed and discussed. As background, a brief overview o
f approaches for predicting the multiaxial fatigue life of smooth spec
imens is presented. Representative test data generated prior to the mi
d 1980s are summrized to demonstrate complexities involved in the mult
iaxial fatigue behavior of notched specimens. During the past decade,
research efforts on this topic have increased, with emphasis on the de
velopment of new multiaxial fatigue damage parameters and approaches f
or simulating notch elastic-plastic cyclic stress-strain behavior. Pro
gress towards the application of simplified approaches, such as Neuber
's rule, to the prediction of notch stress-strain behavior for proport
ional multiaxial loading is described. Other promising work for predic
ting notch stress-strain behavior under nonproportional loading is sum
marized. The newer approaches have considered blunt circumferential no
tches or shoulder fillets and are based on surface stress-strain behav
ior. Test data are shown which suggest that such approaches may not be
adequate for other types of notches (e.g. splines) for which the effe
ct of notch geometry and subsurface stress-strain distributions may be
important. It is suggested that development of methodologies appropri
ate for certain categories of notches may be the most fruitful approac
h to take in future studies, rather than seeking a ''universal methodo
logy''. (C) 1997 Elsevier Science Limited.