Finite Element Method for Hot Cracking Using Temperature Dependent Interface Element (Report II) : Mechanical Study of Houldcroft Test(Mechanics, Strength & Structure Design)

概要

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Based on the interface element proposed for crack propagation problems, a finite element method (FEM) using a temperature dependent interface element is developed. The proposed method is applied to the analysis of the formation and the propagation of hot cracking in welding. In particular, the hot cracking extending from the starting edge of the narrow trapezoidal plate under bead welding is examined using the proposed method. From the present study, the following conclusions are drawn. In case of the trapezoidal specimen with welding from the narrower side, the crack length becomes longer when the welding speed and the heat input is large. This agrees with the phenomenon observed in experiments. In the case of the specimen with welding from the wider side, the welding speed and the heat input influence in the opposite manner.
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