Application of the Fluid Mechanics in Analysis on the Current Field When Crack Arrest Using Pulse Current Discharge
In order to solving the current field around crack tip in metal component when crack prevention using pulse current discharge, the metal test pieces with half-embedded crack are selected as the study object. The complex function method is used as a basis for the theoretical model. In complex functions, the current flow through the conductor with crack is simulated to the fluid flowing through the barricade, their potential function is similarity. The theoretical analysis results show that: The current is concentrated because of the crack existing. The temperature around the crack tip rises instantly above the melting point of the metal. Small welded joints are formed by metal melting as a result of the current concentration effect at the moment while the current pulse is switched on. The numerical simulation method is proposed for analyzing the coupled field of current-thermal field. The analysis process is composed of the thermal-electrical coupled, the current and temperature around the crack is solved at the moment while the pulse current is switched on. The current field results of numerical simulation correspond to the results of the theoretical analysis.
half-embedding crack crack arrest pulse current discharge current field
Fu Yuming Zheng Lijuan Liu Yu Kang Weiming
Yanshan University, College of Mechanical Engineering, Qinhuangdao, 066004, China
国际会议
北戴河
英文
1148-1150
2007-06-06（万方平台首次上网日期，不代表论文的发表时间）