OS1408 構造物中のひずみ集中現象に関する機構論モデルの研究(エネルギー機器の経年変化に関する健全性評価,オーガナイズドセッション)

One of the mechanisms which clarify the strain concentration at discontinuities in structures is the concept of elastic follow-up. In order to evaluate quantitatively the strain concentration, that concept was evolved into the method with the Stress Redistribution Locus (SRL) which is unique to each structure. On this study, the numerical simulations on the "Pipe Model" which takes after actual pipes should be run and it is examined on this model how strain is concentrated inside the pipe. According to that examination, a hypothesis is made that the main factor which determines the shape of SRL is the size ratio of the plastic region to the elastic region in structure. Based on this hypothesis, the "Plastic Region Fixed Model", a pipe-like model in which the size ratio is tied up, was recognized. As a result of simulations on that model, it could be confirmed that the hypothesis is appropriate.