土質材料への侵徹解析

概要

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We make clear the properties of two methods for analyzing penetration into geological materials. One method is based on spherical cavity expantion theory (SCET method). The other method is based on computer simulation of 3-dimensional FEM impact code DYNA 3 D (DYNA 3 D method). Under the condition of a low-velocity region (below 16 m/s), we show the projectile accelerations of the SCET method to be good agreement with those of our drop experiment with sand target. Under the condition of a high-velocity region (over 212 m/s), we show that the projectile accelerations of the DYNA 3 D method are smaller than those of the other method (experiment or SCET method) at the early stage of penetration. The reason is that the resistance of the target is smaller for the small-hole target model of DYNA 3 D calculation at the early stage.
一般社団法人日本機械学会の論文
1992-12-25