Title
Torsion of viscoelastic spheres in contact Torsion of viscoelastic spheres in contact
Author
Faculty/Department
Faculty of Sciences. Mathematics and Computer Science
Publication type
article
Publication
Subject
Physics
Source (journal)
Granular matter
Volume/pages
7(2005) :2-3 , p. 169-179
ISSN
1434-7636
ISI
000230516700012
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
The theory of elastic contact between two spherical bodies is used as a basis for an extension to include the contribution of the viscous effects to the total stress for viscoelastic spheres subjected to twisting moments. Expressions relating twisting moment to penetration of slip and penetration of slip to twist angle are derived. Two term power series truncations of the relations are then used to derive approximate expressions for torsional compliance of the bodies. Validation experiments for the extended model were performed by use of a rheometer device. Applications for the model in post-harvest agriculture include extraction of material properties for use in Discrete Element Modelling of mechanical interactions of fruits and other regular shaped produce during machine handling. A specific application is performed involving the use of a rheometer to measure the coefficient of friction for fruit-fruit contact.
E-info
https://repository.uantwerpen.be/docman/iruaauth/b0af6f/4fc6760.pdf
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