Improved numerical model for fatigue cumulative damage of mechanical structure considering load sequence and interaction

To more accurately predict the fatigue life of components under action random loads, it is necessary to explore influence interaction between load sequence and on prediction. Based Manson-Halford method Corten-Dolan model, this paper establishes a cumulative damage model that takes into account both order also loads near limit. The mechanical parts can be calculated through which provides theoretical basis for prediction spectrum. Comparing calculation results proposed with Palmgren Miner, method, found established reasonably parts. Comparison verification examples further prove accuracy reliability model.