A coupled critical plane- ???????? ? area methodology to estimate fatigue life for an AISI 1045 steel with small artificial defects

The presence of notches, tears, holes, cavities, inclusions, and scratches is common in structural designs and mechanical components, that in the presence of cyclic loading can influence their resistance and fatigue life. The objective of this research is to propose and validate an approach for fatigue life estimation for materials with sma l l defects subjected to combined loading. The approach of the project is formulated based on a calibration strategy for Fatemi-Socie, Smith-Watson-Topper and Susmel and Lazarin critical plane models, using Murakami criteria and notch factor to compute the defect effect. The results predicted by the model were compared and validated with experimental data, showing it to be a promising strategy. For further extension and a more generalized application of the proposed model , it is necessa r y to perform life prediction comparisons for different materials, loadings, and defect geometries.

Automated summary

The presence of defects such as notches, tears, holes, cavities, inclusions, and scratches in structural designs and mechanical components can affect their resistance and fatigue life. This research proposes and validates an approach for estimating the fatigue life of materials with small defects subjected to combined loading.