IGA重合パッチ法(S-version Isogeometric Analysis, S-IGA)による二次元線形破壊力学解析に関する研究

（ローカルパッチ領域の大きさが応力拡大係数計算精度に与える影響）

抄録

In this paper, influences of how the local patch is set in the s-version Isogeometric Analysis (s-IGA) are discussed. In s-IGA, the problems domain is modeled by the global IGA patch. Local features such as cracks, holes, etc. are represented by the local IGA patches. The local IGA patches are superimposed on the global IGA patch. The assumed displacements are set by the sum of those of the global and local patches in the domain of the local patch. It is more tractable to generate the local features by the local patch only than by the monolithic global patch. To assure the accuracy, the size and descretizations of the local patch relative to the elements of the global patch are considered to be important factors. Some considerations on their influences are reported for two dimensional linear fracture mechanics analyses.