Publication
Title
Determining tangential contact force model parameters for viscoelastic materials (apples) using a rheometer
Author
Abstract
A computer model, based on discrete element method (DEM), can simulate damage to fruit during handling. A contact force model is one of the basic ingredients of a DEM model. A rheometer device was used to measure and validate a tangential contact force model for 'Jonagold' apples. The Mindlin and Deresiewicz model for torsion was used to simulate quasi-static torsion and extended to include a viscous term in order to simulate dynamic torsion. The measured parameters were the dynamic friction coefficient, the shear modulus and the viscosity of the apples. For model validation purposes, the angular deformation, the torque, the contact surface and the normal force were measured as well. The model describes, in a satisfactory way, the phenomenon of slip-stick at the contact surface of the apples. By adding the viscous term, the model was improved. (C) 2004 Elsevier B.V. All rights reserved.
Language
English
Source (journal)
Postharvest biology and technology: an international journal. - -
Publication
2004
ISSN
0925-5214
Volume/pages
33:2(2004), p. 111-125
ISI
000222677400002
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 24.02.2014
Last edited 20.09.2017