111 SMAハニカムを用いたサンドイッチパネルの形状修復による曲げ剛性回復の評価(知的材料・構造システム)

概要

論文の詳細を見る
When an impact loading is applied to a sandwich panel, facesheet bending is caused by pull down due to localized core buckling and this deformation leads to deteriorations in the bending stiffness. In order to repair the core buckling, we developed shape memory alloy (SMA) honeycomb which can recover its original shape by heating. For the SMA honeycomb sandwich panel, we conducted four-point bending test before impact loading, after impact loading, and after recovery. After the impact loading, strain concentration induced by change in distance between two faces caused a decrease in bending stiffness. After heating, however, the buckled core walls were repaired and the strain concentration disappeared. As a result, the bending stiffness was recovered. Then, we conducted an analysis using beam theory and FEA in order to reveal the cause of deteriorations in mechanical properties. From these results, it was confirmed that the SMA honeycomb sandwich is effective for the suppression of the impact damage progress.
社団法人日本機械学会の論文
2006-11-25