Abstract
In this research, the authors developed a smart sandwich structure with damage detection and suppression functions using a small-diameter fiber Bragg grating (FBG) sensor and shape memory alloy (SMA) honeycomb core. Impact damage was detected using the change in the reflection spectrum of the FBG sensor due to strain change along a bend of a facesheet caused by core buckling. After the damage detection, in order to heat the SMA honeycomb, a voltage was applied to a nichrome wire embedded in the facesheet. The core buckling disappeared and the bend of the facesheet was relieved. These abilities could also be confirmed by theoretical and numerical simulations.
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