円形弾性体の衝撃解析における不連続変形法の適用

抄録

Discontinuous Deformation Analysis (DDA) was developed by G.H.Shi and has been often applied to rock mechanics problems.The original DDA handles only a polygonal element, therefore the judgment of penetration between elements is complicated.The authors develop elastic circular element for DDA and applied to impact analysis. From several numerical analyses, we could find the spring parameter that satisfies 1-dimensional wave equation.The developed method are applied to contact issues between falling rock and sand cushion, then good results are derived which agree with the past experimental resul s. It is shown that the developed method is effective to impact analysis of granular materials.