Evauation of an energy-based approach and a critic pane approach for predicting constant amplitude multiaxial fatigue life

摘要

A new energy-based approach for predicting constant amplitude mdultiaxial fatigue life is described. The approach is based on cyclic plastic and elastic strain energy densities and takes into account effects of stress-state and mean stresses. A wide range of test data is use dot evaluate the approach as well as a critical plane approach based on maximum amplitude of shear strain modified by the maximum normal stress on the pane of maximum shear strain amplitude. Predictive capabilities of both approaches are found to be comparable, with some differences for certain types of multiaxial loading.