Affiliations: School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
Correspondence:
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Corresponding author: Ming Chen, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China. E-mail:mingchen@sjtu.edu.cn
Abstract: Through the analysis of the J-A model, the metal magnetic
memory signal of Δ B (the distance between Br and -Br) can
reflect the fatigue degree, and can be verified by bending fatigue test of
45# steel. The test results show that Δ B has three stages in the
fatigue process, which correspond to the entire crack propagation process.
By measuring the Δ B values, the fatigue state of the specimen can be
evaluated.
Keywords: Metal magnetic memory, J-A model, rotating bending fatigue
