船体構造部材の静的強度に及ぼす腐食の影響 (第3報)
模擬腐食ピットを有する構造モデルを用いた4点曲げ試験
2004 年 2004 巻 195 号 p. 233-242
詳細
2004 年 2004 巻 195 号 p. 233-242
The purpose of this study is to investigate the effect of pitting corrosion on local strength of hold frames of bulk carriers. A series of 4-point bend tests with structural models which consist of web, shell and face plates has been conducted. Artificial pitting was made on the web plate and bending moment has been applied so that tensile load would act on the face plate. In the case of the long-span model, when pitting concentrated on the web plate near the face plate, cracks were initiated at the bottom of the pits. In the case of the short-span model, local buckling of the web plate occurred near the shell plate and the deformation behavior was strongly affected by the existence of pitting.
Following the experiment, an elasto-plastic analysis has been carried out to simulate the deformation behavior and buckling behavior observed in the experiment in order to verify the method of modeling members with pitting corrosion.
