Simulation analysis and experimental research on stress concentration of test technique based on initial permeability

International Journal of Development Research

Volume: 
7
Article ID: 
9888
6 pages
Research Article

Simulation analysis and experimental research on stress concentration of test technique based on initial permeability

Ren Shangkun, Ren Xianzhi and Guo Feng

Abstract: 

Initial permeability measurement is an early evaluating method of micro-structure changes such as stress concentration and fatigue damage by measuring the change of initial permeability. The detection principle of permeability testing technology for ferromagnetic material was studied and analyzed. The ANSYS finite element simulation model was established, the excitation frequency parameters were optimized, and the changing law of the detection signal with the initial permeability of ferromagnetic material was analyzed. At same time testing platform for permeability testing have been built. Then use the optimized testing platform to complete the tensile testing of 45 steel, and the relationship between detection signal and the tensile stress was studied in further. The experimental result compare to simulating result, which are approximately the same. It indicates that the permeability testing technique is a new, feasible method, which with high testing sensitivity, has a broad application prospect.

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