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Mechanoluminescent Composites Towards Autonomous Impact Damage Detection of Aerospace Structures

D. RYU, N. CASTAÑO, K. VEDERA

Abstract


This study aims to devise mechanoluminescent (ML) composites and characterize the ML properties when the composites are subjected to various levels of compressive impact loads. First, triboluminescent europium dibenzoylmethide triethylammonium (EuD4TEA) crystals are synthesized. EuD4TEA crystals are embedded into siliconbased elastomer to fabricate ML composites. Second, the mechano-photonic energy conversion capability of the ML composites is validated. Finally, ML properties are characterized using the split Hopkins pressure bar to apply impact energy. High-speed camera captured impact moments, and the recorded images are processed to quantify the light emitted from EuD4TEA.

doi: 10.12783/SHM2015/275


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