3次元マイクロラティスで構成された梁の曲げ特性評価（第1報 数値解析に基づく検討）

Abstract

In this paper, the bending properties of micro-lattice beam (second moment of area and natural frequency) are presented. In particular, the effects of overall lengths of the beam and geometries of the unit-cell on these properties are investigated by using FE analysis. The second moment of area for the micro-lattice beam depends strongly on the geometries of the unit-cell (strand’s length, diameter and angles among the adjacent strands), and its trend is not the same as the continuous solid beam. On the other hand, the observed vibration modes for the micro-lattice beam are similar to those for a solid beam, and their natural frequencies can be estimated precisely using the initial stiffness, the second moment of area obtained by structural analysis and the mass per unit length for the lattice beam, if the wavelength for each mode is ten times as long as the width of the unit-cell.