345 EL バックライトを用いた損傷検出に及ぼす透過光強度の応力変動の影響

概要

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The present paper proposes a new damage monitoring system that employs luminance of EL backlight for semi-transparent composites. For the semi-transparent composites, damage is easily found by visual inspections. In the cases that the structures are sealed or huge structures, however, the visual inspections are difficult. The present paper adopts a system using change of luminance of transmitted light. When the composite structures are damaged, the damage reduces luminance of the transmitted light from the backside. The EL present study adopts an Electro Luminescent device (EL) as the backlight. The EL device can emit uniform-plane-light and is a very flexible device. The EL device can be mounted on a curved surface. Static tension tests and bending tests are conducted using rectangular specimens fabricated from glass/epoxy composites. The monitoring system is applied to the static tension test., and it is shown that change of luminance of transmitted lihgt is caused by expansion of space between fibers. And the method is applied to bending test, and it is shown that it is possible to measure a strain.
一般社団法人日本機械学会の論文
2000-07-31