正三角形配列円孔板の応力再配分挙動に関する機構論的考察
Study on the Stress-Strain Redistribution Caused by Inelastic Deformation inPerforated Plates with Triangular Pattern of Holes
著者:
池田 翔 Sho IKEDA 佐藤 雅一 Masakazu SATO 笠原 直人 Naoto KASAHARA
発刊日:
公開日:
CreepElevated temperature structurePerforated plateSRLStress concentrationStress-strain redistribution
概要
Abstract Fast breeder reactors which are operated at elevated temperature must be designed considering creep deformation in addition to elastic-plastic deformation. Especially at structural discontinuities, strain concentration induced by stress-strain redistribution reduces creep- fatigue strength. For this reason, a design method is needed for appropriately evaluating inelastic behavior at structural discontinuities. As one of the simplified methods with elastic analysis, a rational method with Stress Redistribution Locus (SRL) has been studied during recen t years. Previous studies have shown that SRL depends neither on constitutive equations nor on the magnitude of loading. And through the inelastic analysis of a one-dimensional pipe model, it was revealed that there was a relation between stress-strain redistribution and the region of elastic cores. The purpose of this study is to clarify the mechanism of stress-strain redistribution in complex structures like actual components. Inelastic analyses on perforated plate were performed and the relation between the region of elastic cores and SRL was investigated.
