Title
Determination of the dynamical behaviour of biological materials during impact using a pendulum device Determination of the dynamical behaviour of biological materials during impact using a pendulum device
Author
Faculty/Department
Faculty of Sciences. Mathematics and Computer Science
Publication type
article
Publication
London ,
Subject
Physics
Source (journal)
Journal of sound and vibration / University of Southampton. Institute of Sound and Vibration Research. - London
Volume/pages
266(2003) :3 , p. 465-480
ISSN
0022-460X
ISI
000185420200005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
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. (C) 2003 Elsevier Ltd. All rights reserved.
E-info
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