FTMP場の理論に基づく疲労き裂発生過程のモデル化に関する検討

抄録

Typical fatigue failure mode is primarily triggered by surface crack initiation processes, associated with formations of persistent slip bands (PSBs) during cyclic straining, where the PSBs consist of a well-organized dislocation substructure accompanied by the alternating ladder-channel patterns. FTMP-based finite element simulations have been demonstrated to be able to reproduce not only the ladder-structured PSBs but also the attendant surface groove formation and its growth. To advance the simulation framework toward the crack initiation stage, we attempt here to extend it to the corresponding restart analyses based on Di-CAP concept, which allows us “cut-&-paste” operations. Some preliminary results including the cut-away and restart processes are demonstrated.