フォッカーボンドテスタによる繊維強化プラスチックの非破壊検査(<小特集>強化プラスチック小特集)

概要

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By using Fokker's Bond Tester, resonance characteristics (Δ_f) of the coupled system between materials and a transducer were experimentally and theoretically studied. As the materials, fiber reinforced plastics (FRP) , plastics/metal lapped sheets and FRP with artificial defects were used. Δ_f of such materials were compared with those of sound polymethylmethacrilate sheets. Δ_f of FRP with artificial defects were also compared with those of FRP delaminated by fatigue tests. Possibility of detection of such delamination was examined experimentally. A characteristic curve of Δ_f of polymethylmethacrilate sheets was found to resemble the modified of FRP, plastics/metal lapped sheets and etc.. The curves of Δ_f of FRP with artificial defects were nearly equal to that of FRP delaminated by fatigue tests. The size of the smallest defects in FRP which can be detected by the instrument was proportional to the bottom area of transducers. The size was influenced also by the thickness of the upper and the lower zones of specimens.
社団法人日本材料学会の論文
1981-12-15