ＣＦＲＰサンドイッチパネルの衝撃損傷のＳＭＡ箔ハニカムコアによる修復

概要

論文の詳細を見る
When an impact loading is applied to a sandwich panel with CFRP facesheets, the facesheet is bent in the out-of-plane direction and this deformation leads to deteriorations in the bending stiffness and the in-plane compressive strength. However, since the bending is elastic deformation, the facesheet will return to flat if the core buckling is repaired. Hence the authors developed shape memory alloy (SMA) honeycomb core and bonded the core to two CFRP facesheets, in which thin nichrome wires were embedded to heat the SMA core. When a voltage was applied to the nichrome wires, the core buckling caused by an impact loading disappeared and the deflection of the facesheet was relieved. This result shows that the SMA honeycomb core is effective for the suppression of the impact damage progress. Furthermore, the area repaired by the energization of the nichrome wire could be well simulated using a finite element analysis.
日本実験力学会の論文