DEVELOPEMENT OF FEM-DEM COMBINED METHOD FOR FRACTURE ANALYSIS OF A CONTINUOUS MEDIA

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  • 連続体破壊解析のためのFEM-DEM結合解析法の提案
  • レンゾクタイ ハカイ カイセキ ノ タメ ノ FEM DEM ケツゴウ カイセキホウ ノ テイアン

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Abstract

A new analysis method, which is a hybrid of the Finite Element Method (FEM) and the Distinct Element Method (DEM), is proposed for fracture analysis of continuous media. The basic concepts of the new method are introduced in contrast with the conventional DEM. In the new method, three distinct elements are connected by one equilateral triangular finite element (constant strain). The efficiency of the new method is evaluated through static, fracture and re-contact analyses for several kinds of materials. Finally, as an application of the developed method, dynamic fracture analysis of surface ground on a non-uniform base rock is carried out under seismic wave and estimation of pipeline's damage is also conducted.

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