4. Comparison of predicting results of different models
Two-stage loading tests of Al2024 aluminum alloy, welded joints of aluminum alloy body, and nodular cast iron (GS61) of high-speed EMUS and four-stage loading test of aluminum alloy 6082T6 are used to verify the validity of the proposed model.
4.1. Two-stage loading
Results of alloy Al2024
The material studied by Pavlou is aluminum alloy Al202426. The life of loading stress 150Mpa is 430000 cycles, and the life of loading stress 200Mpa is 150000 cycles.
Table 1 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 1 Experimental and model prediction results of Al2024