Code_Asterのき裂進展解析

抄録

Large scale structures such as bridges, ships, aircraft are served for a long time. Fatigue cracks can be generated in some parts of the structures. When cracks are small, the stress distribution around the crack does not affect entire the structure. However, large deformation and function loss of structures are largely induced by breaking portions after crack propagation. On the other hand, it is important to grasp the crack propagation behavior for safety purpose until repairing because arrangement of the repairing may take a long time. This paper shows some case studies of crack propagation analysis evaluation for stress intensity factors and crack trajectories for some portions of large structures by the Code_aster's X-FEM function. Code_Aster is open-source software for mainly structual and thermal analysis.