| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Salmi, Ari
University of Helsinki
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2023Preventing Formation of Metal Dendrites During Electroplating Using External Ultrasonic Actuatorscitations
- 2023Evaluation of bone growth around bioactive glass S53P4 by scanning acoustic microscopy co-registered with optical interferometry and elemental analysiscitations
- 20234D Scanning Acoustic Microscopy
- 2023Ultrasound-based surface sampling in immersion for mass spectrometrycitations
- 2022Coupling Power Ultrasound into Industrial Pipe Walls
- 2022Preventing Formation of Metal Dendrites During Electroplating Using External Ultrasonic Actuatorscitations
- 2022FEM-based time-reversal technique for an ultrasonic cleaning applicationcitations
- 2022CESAM - Coded excitation scanning acoustic microscopecitations
- 2022Identifying Regions-of-Interest and Extracting Gold from PCBs Using MHz HIFUcitations
- 20224D Scanning Acoustic Microscopy
- 2021CESAM - Coded excitation scanning acoustic microscopecitations
- 2021FEM-based time-reversal enhanced ultrasonic cleaningcitations
- 2019Coded Acoustic Microscopy to Study Wood Mechanics and Developmentcitations
- 2019Digital Eyewearcitations
- 2018Detecting Industrial Fouling by Monotonicity during Ultrasonic Cleaningcitations
- 2013Cyclic impulsive compression loading along the radial and tangential wood directions causes localized fatiguecitations
- 2008Crystallization and shear modulus of a forming biopolymer film determined by in situ x-ray diffraction and ultrasound reflection methodscitations
- 2006Measuring in-plane mechanical properties of plate-like samples using phonographic pickupscitations
Places of action
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article
Measuring in-plane mechanical properties of plate-like samples using phonographic pickups
Abstract
An affordable acoustic method to estimate mechanical film characteristics with in-plane shear and longitudinal waves was developed. A 23 kHz (24% FBW,-3 dB) signal was excited into thin plate-like samples with a piezoceramic pickup (Ronette ST105/ Tonar) and received with an inductive pickup (Shure M92E). Signal-to-noise ratios of 12-27 dB were obtained corresponding to a two-way insertion loss of-105.5,-94.5 dB (shear, long). From the time-of-flight the phase velocity of the wave was estimated. This actuation-detection scheme can excite in-plane acoustic waves in the sample. An in-plane mode purity of-45 dB was recorded. Laser Doppler vibrometry showed that the waves were truly in-plane. The method showed good repeatability with a standard deviation of 2 m s-1 (0.17%) for shear and 5 m s-1 (0.22%) for longitudinal waves. Elastic and shear moduli as well as the Poisson ratio were determined for 174 +/- 2 mu m thick Mylar((R)) and 184 +/- 2 mu m thick (795 +/- 10 kg m(-3)) coated paper samples (24 +/- 0.5 degrees C and 40 +/- 5% RH). The estimated in-plane moduli for the Mylar((R)) showed a 30% offset, but exhibited the same ratio, compared to the sample manufacturer values (ASTM D 882 test). The effect of heating the sample (140 +/- 1 degrees C) was studied and changes in the dynamic mechanical moduli of the samples on the order of 3% were detected.