Aiming at the phenomenon of fracture failure caused by surface crack propagation in metal structures, a novel calculation method for shape evolution of surface crack growth is proposed considering crack closure effects. The functional relationship between shape parameters of surface crack in plate under fatigue loads is calculated by the novel calculation method, and the surface crack propagation shape evolution is simulated by the calculation results. Surface crack growth experiments in plate is carried out, the experiments results are compared with calculated results. The test results are basically identical with calculation results, which shows that the method based on energy release rate is effective for calculate shape evolution of surface crack.

Xinglu Wang, Kun Zhao, Rui He. Study on Fatigue Propagation of Surface Crack in Metallic Materials. Academic Journal of Engineering and Technology Science (2020) Vol. 3 Issue 6: 67-74. https://doi.org/10.25236/AJETS.2020.030608.

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