Determination of the dynamical behaviour of biological materials during impact using a pendulum device

A pendulum device has been developed to measure contact force, displacement and displacement rate of an impactor during its impact on the sample. Displacement, classically measured by double integration of an accelerometer, was determined in an alternative way using a more accurate incremental optic...

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Bibliographic Details
Published in:	Journal of sound and vibration Vol. 266; no. 3; pp. 465 - 480
Main Authors:	Van Zeebroeck, M., Tijskens, E., Liedekerke, P.Van, Deli, V., Baerdemaeker, J.De, Ramon, H.
Format:	Journal Article Conference Proceeding
Language:	English
Published:	London Elsevier Ltd 18-09-2003 Elsevier
Subjects:	Biological and medical sciences Biomechanics. Biorheology Exact sciences and technology Food industries Fundamental and applied biological sciences. Psychology Fundamental areas of phenomenology (including applications) General aspects Measurement and testing methods Measurement methods and techniques in continuum mechanics of solids Methods of analysis, processing and quality control, regulation, standards Physics Solid mechanics Structural and continuum mechanics Tissues, organs and organisms biophysics Biomechanics Mechanical test Optical encoder Force measurement Fruit Food industry Optical sensor Pendulum Impact test Biological material
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Summary:	A pendulum device has been developed to measure contact force, displacement and displacement rate of an impactor during its impact on the sample. Displacement, classically measured by double integration of an accelerometer, was determined in an alternative way using a more accurate incremental optical encoder. The parameters of the Kuwabara–Kono contact force model for impact of spheres have been estimated using an optimization method, taking the experimentally measured displacement, displacement rate and contact force into account. The accuracy of the method was verified using a rubber ball. Contact force parameters for the Kuwabara–Kono model have been estimated with success for three biological materials, i.e., apples, tomatoes and potatoes. The variability in the parameter estimations for the biological materials was quite high and can be explained by geometric differences (radius of curvature) and by biological variation of mechanical tissue properties.
ISSN:	0022-460X 1095-8568
DOI:	10.1016/S0022-460X(03)00579-0