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Elasto-viscoplastic model for rayon yarns.

Elasto-viscoplastic model for rayon yarns.

Authors :
Moscatelli, Marco
Pires da Costa, Lucas
Caracino, Paola
Agresti, Simone
Novati, Giorgio
Comi, Claudia
Source :
Meccanica; May2024, Vol. 59 Issue 5, p793-810, 18p
Publication Year :
2024

Abstract

In this paper we develop a new model for the simulation of the mechanical behavior of rayon twisted yarns, at macroscopic level. A yarn with its continuous filaments is represented by an equivalent three-dimensional solid of cylindrical shape, discretized by finite elements, with properly defined local anisotropic material properties. The new constitutive model, inspired by experimental results on rayon untwisted yarns, is formulated in the framework of the thermodynamics of irreversible processes and includes visco-elastic and visco-plastic dissipation mechanisms. The effect of twist is taken into account by including the direction of the fibers in the free energy definition. The overall model is validated comparing numerical and experimental results on twisted rayon yarns. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00256455
Volume :
59
Issue :
5
Database :
Complementary Index
Journal :
Meccanica
Publication Type :
Academic Journal
Accession number :
177481980
Full Text :
https://doi.org/10.1007/s11012-024-01785-3