Abstract: A novel method for quantitative characterization of stress concentration based on the tangential component of metal magnetic memory (MMM) signal, H_{p}(x) , was studied via fatigue testing and MMM testing of notched plate samples. In this research, the changing regularity of H_{p}(x) signals is found out. A method to calculate stress concentration factor from H_{p}(x) signals is established, and a new conception of magnetic stress concentration factor K_{H} , H_{p}(x)_{max} /H_{p}(x)_{ave} , is put forward to quantitatively characterize stress concentration in mechanical components. The research provides the potential possibility of quantitative inspection for metal magnetic memory testing.
Keywords: Stress concentration, metal magnetic memory, quantitative characterization, magnetic stress concentration factor