论文期刊

Magnetic charge model for 3D MMM signals




作者: Shi Pengpeng, Zheng Xiaojing
发表/完成日期: 2014-09-12
期刊名称: Nondestructive Testing and Evaluation
期卷: 31(1)
相关文章:
论文简介
Stress concentration is a major cause of metal structure failures. Based on the metal magnetic memory (MMM) technique, detailed information of stress concentration or defects on ferromagnetic materials can be obtained from the changed magnetic signals. The magnetic charge model of MMM signal is described, and simulations based on this model are performed for a sample with stress-concentration zone or a long elliptical defect. Some basic characteristics produced by present model are coincident with existed experimental measurements. The agreements between simulations and experimental results confirm that the present magnetic charge model can be used as an MMM signal forward technique.