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Material model of pulp fibres
Author(s) -
Seidlhofer Tristan,
Hirn Ulrich,
Ulz Manfred
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900053
Subject(s) - viscoplasticity , viscoelasticity , constitutive equation , pulp (tooth) , materials science , logarithm , composite material , mathematics , structural engineering , mathematical analysis , engineering , finite element method , medicine , pathology
Pulp fibres are a part of the paper fibre network and contribute to its non‐linear rate‐dependent behaviour [1]. An appropriate material model helps to quantify and understand these mechanisms, which are highly relevant to industry. The development of the constitutive equations is based on cyclic uniaxial tension tests [2]. For that first a one dimensional viscoelastic, viscoplastic model was designed to fit experimental data. This one dimensional model is then ported to a three dimensional formulation with the logarithmic strain framework [3]. The investigation shows that pulp fibres have a distinct plastic behaviour, which could be the cause of the non‐linear behaviour on the macroscopic level of the network.