Plate wave resonance — a contactless test method |
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| Authors: | M Luukkala P Heikkila and J Surakka |
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| Institution: | Department of Technical Physics, Helsinki University of Technology, Otaniemi, Finland |
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| Abstract: | A method is described whereby plate waves can be excited in thin sheets (such as paper or cardboard) directly from air without touching the sample. Using this contactless method, non-destructive testing of the elastic properties of various papers can be performed. The method may prove to be useful in “on-line” testing of various other, non-woven materials like plastic sheets. |
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