A sectional critical plane model for multiaxial high-cycle fatigue life
prediction
Abstract
A stress-based sectional critical plane model for multiaxial fatigue
life prediction is proposed. The proposed model considers the effects of
material properties and loading paths on the crack initiation and
propagation behaviors. By introducing the ratio of maximum shear stress
amplitude to maximum normal stress amplitude, it is divided into three
sections in which the maximum normal stress plane, maximum damage plane
and maximum shear stress amplitude plane are considered as the critical
planes, respectively. To verify the accuracy and applicability of the
proposed model, experimental data of 30CrMnSiA steel conducted by the
authors and other test data of different materials from the existing
literatures are utilized. For 30CrMnSiA steel, the prediction results of
the proposed model demonstrate that 79.3% and 93.7% of the prediction
results are within the ±2 times and ±3 times scatter band of fatigue
life. For the experimental data from the existing literatures, more than
85% and 70% of the results predicted by the proposed model are within
±3 times scatter band of fatigue life for steel and aluminum alloy
materials, respectively.