軸方向にマルチき裂を有するシェル構造の非線形数値解析と実験検証(<小特集>:非弾性挙動の力学)

抄録

Interaction of multiple axial pre-cracks in a pressurized fuselage was investigated using a small scale model of an idealized fuselage. Stain between multiple cracks under rapidly cracks propagation was measured. The recorded crack velocities justified the use of a successive finite element analysis with large shell deformation. The experimental results of a rupturing model fuselage represented the variations in the mixed mode stress intensity factors, K_I and K_IIand the remote stress components σ_oxwith cracks extension. The crack kinking location, kinking angles and the off-axis crack trajectories are predicted by numerical analysis, and the validity of the calculated results is discussed in comparison with the experimental data.