Cycle life prediction under low cycle fatigue using nonlinear Marco - Starkey model

The process of deformation and fracture structural alloys under low-cycle fatigue in conditions uniaxial loading with axial strain control complex cycle shape block has been studied. obtained results experimental studies were used to assess the possibility using nonlinear Marco - Starkey damage accumulation model. processing nickel alloy cyclic tests a simple form carried out. A combination exponents included non-linear model was selected which for case M-shaped made it possible predict durability is good agreement test data. main problem predicting an presence many combinations that allow same accuracy. To determine uniqueness solution proposed carry out set loading. Experimental have on processes deformation, D16T aluminum forms constant parameters, variable parameters control. Based according new method m degrees coefficients selected, range from 0.2 10 step 0.2. Comparison forecasting blocks consisting three groups find several general two are present all blocks. final choice pair condition predicted close unity first (test) block. values