Scientific journal

54 2015

Journal of Food and Nutrition Research
Summary No. 3 / 2015

Knapek, M. – Gabriel, P. – Král, R. – Chmelík, F. – Sladký, P.
Monitoring of the deformation of cereal grains by the acoustic emission technique
Journal of Food and Nutrition Research, 54, 2015, No. 3, s. 275-279

Michal Knapek, Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, Prague 121 16, Czech Republic. E-mail:

Received 13 March 2015; revised 27 April 2015; accepted 30 April 2015; published online 27 May 2015.

Summary: In this work, the deformation behaviour of cereal grains is addressed as a very important physical property reflecting the grain quality. Deformation curves are a graphical measure of mechanical properties and therefore are often used to classify the cereal grains. Up to now, only a limited work has been done to examine the grain quality related to elastic or viscoelastic properties. A method for simultaneous measurements of grain deformation and acoustic emission (AE) data is proposed here, as the AE technique provides information about dynamic processes involved in the deformation and failure of tested materials. A specialized measurement set-up, which has been developed, is presented. First results revealing clear correlations between the load drops and the AE data are shown. Possible applications of this new method in the field of cereal grain quality evaluation are also discussed.

Keywords: cereal grains; compression tests; acoustic emission; mechanical properties

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