Creep Characteristics in Thick Welded Joints and Their Improvements (Report I) : Development of A Simple Model for Creep Analysis of A Thick Welded Joint(Mechanics, Strength & Structure Design)

概要

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Reliable predictions of the creep behavior of thick welded joints are very important to secure the safety of elevated temperature vessels like nuclear reactors. Creep behavior is very complex, thus it is difficult to practice the experiment and conduct the theoretical analysis. A simple accurate model for theoretical analysis was developed in this study. The simple model is constructed of several one-dimensional finite elements which can analyze not only one-dimensional creep behavior but also the three-dimensional case. The model is easy to treat, and needs only a little labor and computation time to predict the creep curve and the local strain for a thick welded joint. The simple model will be verified by comparing the analyzed results with the experimental ones in the next report.
大阪大学の論文