关键词: 电磁热效应, 埋藏裂纹, 止裂, 温度场, 脉冲放电

Abstract: Theoretical analysis is made on the temperature field at the time of pulse current discharge in a metal structure with an elliptical embedding crack. In finding the temperature field, analogy between the current flow through an
elliptical embedding crack and the fluid flow through a barrier is made based on the similarity principle. Boundary conditions derived from this theory are introduced so that the distribution of current density and the temperature field expressions can be obtained. The study provides a theoretic basis to the applications of stopping spatial crack with electromagnetic heating.

Key words: temperature field, pulse current discharge, electromagnetic heating effect, embedding crack, crack arrest