Analysis of Welding Stress Relieving by Annealing based on Finite Element Method

概要

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In order to analyze theoretically creep behaviors accompanied by stress relief annealing, the authors extended their theory of thermal elastic-plastic analysis based on the finite element method. In the developed theory, the temperature dependency of the mechanical properties of metal is taken account. Examples were analyzed for two kinds of creep laws, the power and the exponential laws, which are observed in such material as quenched and tempered H.T.60. The solution by the method was assured its convergence for a comparatively large time increment if changes of stresses and creep properties in one increment of calculation steps are taken into consideration. The results of analysis show good coincident with the experiment. By this method, the behavior of welded joints revealed during the entire thermal cycle, from welding to stress relief annealing, can be analyzed consistently.
大阪大学の論文