Simulation of triaxial deformation of wet fiber networks

Pasi P.J. Miettinen, Jukka A. Ketoja

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Triaxial deformations of very wet and weak fiber networks under tensile load were investigated by computer simulations. Numerical studies show that lateral Poisson's ratio depends on the applied strain as shown by earlier micromechanical models. Simulations also capture experimentally observed behavior of network thickness during straining. Network thickness decreases or increases during stretching depending on the fiber stiffness. For very stiff fibers, network slightly expands in the thickness direction as proposed for wet fiber networks. The shape of stress-strain curve is affected by the gap length, which should be taken into account when analyzing short span tensile tests.
Original languageEnglish
Pages (from-to)264-271
Number of pages8
JournalNordic Pulp and Paper Research Journal
Volume23
Issue number3
DOIs
Publication statusPublished - 20 Oct 2008
MoE publication typeA1 Journal article-refereed

Fingerprint

Fibers
simulation
computer simulation
Poisson ratio
Stress-strain curves
Stretching
stiffness
Stiffness
fibre
Computer simulation
testing
Direction compound
test

Keywords

  • Network deformation
  • Poisson ratio
  • Simulation
  • Wet webs

Cite this

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Simulation of triaxial deformation of wet fiber networks. / Miettinen, Pasi P.J.; Ketoja, Jukka A.

In: Nordic Pulp and Paper Research Journal, Vol. 23, No. 3, 20.10.2008, p. 264-271.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Simulation of triaxial deformation of wet fiber networks

AU - Miettinen, Pasi P.J.

AU - Ketoja, Jukka A.

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N2 - Triaxial deformations of very wet and weak fiber networks under tensile load were investigated by computer simulations. Numerical studies show that lateral Poisson's ratio depends on the applied strain as shown by earlier micromechanical models. Simulations also capture experimentally observed behavior of network thickness during straining. Network thickness decreases or increases during stretching depending on the fiber stiffness. For very stiff fibers, network slightly expands in the thickness direction as proposed for wet fiber networks. The shape of stress-strain curve is affected by the gap length, which should be taken into account when analyzing short span tensile tests.

AB - Triaxial deformations of very wet and weak fiber networks under tensile load were investigated by computer simulations. Numerical studies show that lateral Poisson's ratio depends on the applied strain as shown by earlier micromechanical models. Simulations also capture experimentally observed behavior of network thickness during straining. Network thickness decreases or increases during stretching depending on the fiber stiffness. For very stiff fibers, network slightly expands in the thickness direction as proposed for wet fiber networks. The shape of stress-strain curve is affected by the gap length, which should be taken into account when analyzing short span tensile tests.

KW - Network deformation

KW - Poisson ratio

KW - Simulation

KW - Wet webs

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