Abstract
This paper presents the finite element analyses and experimental studies of the melting notch tip in the steel strip under the electro-thermal machining associated with high electric current. Under the electric load, a hot spot occurs at the notch tip due to the electric current density concentration and Joule heating effect. This hot spot will melt when the applied electric energy is sufficient. Numerical results predict the temperature field and melting size of the hot spot. Experimental studies show the hot spot, melting area, solidification, shrinking hole and heat affected zone around the notch tip under the electro-thermal machining. The results of this study provide the concepts for increasing the fatigue life or stopping the crack propagation.
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