亀裂損傷を有する円筒部材の曲げ耐荷力に関する研究

概要

論文の詳細を見る
Load carrying capacity of a tubular member with a circumferential through-thickness crack is investigated. Firstly, a series of pure bending tests is carried out. Then, based on the experimental results, generation phase analysis is performed using the finite element method. In the analysis, both material and geometrical non-linearities are taken into account. Application phase analysis is also perforrned considering the J-integral and the crack opening angle as initiation and propagation conditions of a crack, respectively. It has been found that ; (1) Load carrying capacity and rigidity decrease due to the presence of a crack. (2) Ultimate strength is attained after the crack propagation starts. (3) Higher ultimate strength is attained with higher critical value of J-Integral. (4) The decrease in load carrying capacity is observed to be more with lower value of critical crack opening angle.
社団法人日本船舶海洋工学会の論文