Articles
NON LINEAR VISCOELASTIC BEHAVIOR OF SPHERICAL FRUITS
Article number
562_21
Pages
187 – 194
Language
English
Abstract
This work presents a study of contact stress phenomena in spherical fruits which generates non-linear relations for force and deformation.
The material viscoelastic behavior is then associated with the non-linear relations due to the geometry of the body, generating a non linear viscoelastic problem.
Such a non-linearity is called geometric non linearity.
Elastic-Viscoelastic correspondence principle can not support the present case due the changes in boundary conditions.
A technique was developed to measure the contact area and by means of the Hertz Contact Stress Theory, a function
(t)was defined, which is strongly influenced by force and deformation rates.
The material viscoelastic behavior is then associated with the non-linear relations due to the geometry of the body, generating a non linear viscoelastic problem.
Such a non-linearity is called geometric non linearity.
Elastic-Viscoelastic correspondence principle can not support the present case due the changes in boundary conditions.
A technique was developed to measure the contact area and by means of the Hertz Contact Stress Theory, a function
(t)was defined, which is strongly influenced by force and deformation rates.
Authors
A.W. Linares, I.M. Dal Fabbro
Keywords
Contact Stress, non linear viscoelasticity
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