FIGURE 6 Comparison of the predictive capability of five models for the
remaining life of Al2024
Results of welded joints of aluminum alloy body
The fatigue test of welded joints of the aluminum alloy body of a
high-speed EMU was analyzed as an example27. When the
loading stress of aluminum alloy butt joints is 104, 89, and 74Mpa, the
fatigue life is 549300, 880500, and 1540100 cycles, respectively. The
fatigue life of aluminum alloy angle joints is 619800, 952300, and
1546100 cycles when the loading stress is 93, 83, and 73Mpa,
respectively.
Table 2 gives the experimental remaining life fraction and the predicted
life fraction of Miner’s rule, the K-R model, Zhu’s model, Li’s model,
and the new model.
TABLE 2 Experimental and model prediction results of welded joints