分離・結合を伴う疲労き裂進展のSPH解析および疲労試験による検証

抄録

In this study, a new fatigue crack propagation analysis method is proposed using the smoothed particle hydrodynamics (SPH). First, a crack is simply modeled as an aggregate of particle voids and the crack tip line is given a feature of changing its shape naturally like a chain. Next, a crack propagation algorithm that uses the SPH when solving the equation and updating the crack tip is constructed. Finally, several numerical solutions are given to confirm the utility and the validity of the proposed method. In case of a crack propagation problem around a hole, the crack separation and merging process is computed successfully, and, in another crack propagation study around a slit, the numerical result shows almost the same time dependent crack shape history as an experimental result.