In this paper, the cumulative strain energy density, also called fatigue toughness, was used
to predict the fatigue life of notched members subjected to multiaxial loading. The
relationship between the total energy absorbed to fracture and the number of cycles to
failure was established from uniaxial strain-controlled fatigue tests. Multiaxial fatigue tests
were performed on notched round bars made of high-strength steel under proportional
bending-torsion considering different normal stress to shear stress ratios and different …