不連続要素と等値面の再構成手法を用いた粒子分散型2相材料の3次元イメージベース有限要素モデリング(<特集>メッシュフリー法とその周辺技術)

概要

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An embedded discontinuous finite element based on the enhanced assumed strain method is used to model interfaces between granular and matrix phases. Each element is defined by a unit cube whose vertices are the eight nearest sampling points of 3-D digital image. Interfaces in an element can be easily reconstructed by the edge-based iso-surface contouring algorithm. The contouring algorithm reconstructs up to four interfaces per element, while only one interface per element is modeled in finite element formulation. Therefore, an image processing algorithm is proposed so that the contouring algorithm reconstructs at most one interface. Some numerical examples, which are computed by using the homogenization method and a simple damage model of interface, are shown to discuss the applicability of the present modeling to granular composites.
社団法人日本機械学会の論文
2004-03-25