Analysis of multiaxial fatigue models based on the results of biaxial tests for aluminum alloys

During operation, modern structures and their parts are subjected to complex cyclic loads. In this case, a stress-strain state can arise in products, which lead significant decrease fatigue life. regard, the development of methods for predicting fracture critical becomes urgent. The purpose work is test simple approach describing multiaxial datasets presented literature compare it with known models. Within framework study, actual experimental data was considered, containing on aluminum alloys 2024-T3 2024-T4. actively used designs aircraft, ships spacecraft. As result, Sines model its modernized version were considered (taking into account first invariant stress tensor respect amplitude values). At same time, an developed determine constants models based results two variants training experiments. paper presents form relationships predicted life, obtained using modification types tests. final part work, comparative analysis modification, Smith-Watson-Topper, Fatemi-Socie carried out. showed that modified significantly improves predictive ability, proposed better described than traditional Smith-Watson-Topper approach. descriptive ability comparable one.