FEM modelling of wood cell deformation under dynamic loads

Stefania Fortino, Petr Hradil

    Research output: Contribution to conference › Conference Abstract › Scientific › peer-review

    Abstract

    Dynamic compressive and shear loads applied to wet woodchips at high values of speed and temperature during thermo-mechanical pulping are aimed at separating wood fibres from the raw material to increase both the flexibility and the bonding ability of the fibres [1,2]. However, further research is needed to deeply understand the complex mechanisms at the origin of wood cell disintegration. Recent studies have pointed out the importance of both experimental and computational research at the microscale of wood to define the properties of this hygroscopic and highly anisotropic material as well as to understand the complex phenomena occurring in wood cells under different processes and environments [3,4]. A Swedish research presented in [1] has provided interesting experimental results in regards to wet wood cell deformation and measurements of the work done under different low speed loads (see references in [2]). A finite element model was also introduced to simulate the deformation of cells in [2]. The present study proposes a flexible FEM tool for Abaqus code based on the data presented in [2]. It uses an automated script for parametric model generation combined with a Vmat user subroutine [5]. The model is able to analyse the influence of different geometrical parameters on the cell wall opening and the effect of contacts among cell walls during loading. Compared to previous FEM models, the influence of the plastic behaviour of wood cells under compression [6] is also investigated. The numerical method provides results in terms of load-displacement curves with the aim to obtain important suggestions for the energy saving during thermo-mechanical pulping processes.
    Original languageEnglish
    Publication statusPublished - 2013
    EventXII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013 - Barcelona, Spain
    Duration: 3 Sep 2013 → 5 Sep 2013
    http://new.eccomas.org/wp-content/uploads/sites/2/2018/02/TC-PROCEEDINGS-2013-COMPLAS.pdf (Full proceedings)

    Conference

    ConferenceXII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013
    Abbreviated titleCOMPLAS 2013
    CountrySpain
    CityBarcelona
    Period3/09/13 → 5/09/13
    Internet address

    Fingerprint

    Dynamic loads
    Wood
    Finite element method
    Thermomechanical pulping process
    Cells
    Fibers
    Disintegration
    Subroutines
    Loads (forces)
    Numerical methods
    Energy conservation
    Raw materials
    Compaction
    Plastics
    Temperature

    Keywords

    • wood cell
    • TM pulping
    • microscale modelling
    • FEM
    • ProperTune

    Cite this

    Fortino, S., & Hradil, P. (2013). FEM modelling of wood cell deformation under dynamic loads. Abstract from XII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013, Barcelona, Spain.
    Fortino, Stefania ; Hradil, Petr. / FEM modelling of wood cell deformation under dynamic loads. Abstract from XII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013, Barcelona, Spain.
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    title = "FEM modelling of wood cell deformation under dynamic loads",
    abstract = "Dynamic compressive and shear loads applied to wet woodchips at high values of speed and temperature during thermo-mechanical pulping are aimed at separating wood fibres from the raw material to increase both the flexibility and the bonding ability of the fibres [1,2]. However, further research is needed to deeply understand the complex mechanisms at the origin of wood cell disintegration. Recent studies have pointed out the importance of both experimental and computational research at the microscale of wood to define the properties of this hygroscopic and highly anisotropic material as well as to understand the complex phenomena occurring in wood cells under different processes and environments [3,4]. A Swedish research presented in [1] has provided interesting experimental results in regards to wet wood cell deformation and measurements of the work done under different low speed loads (see references in [2]). A finite element model was also introduced to simulate the deformation of cells in [2]. The present study proposes a flexible FEM tool for Abaqus code based on the data presented in [2]. It uses an automated script for parametric model generation combined with a Vmat user subroutine [5]. The model is able to analyse the influence of different geometrical parameters on the cell wall opening and the effect of contacts among cell walls during loading. Compared to previous FEM models, the influence of the plastic behaviour of wood cells under compression [6] is also investigated. The numerical method provides results in terms of load-displacement curves with the aim to obtain important suggestions for the energy saving during thermo-mechanical pulping processes.",
    keywords = "wood cell, TM pulping, microscale modelling, FEM, ProperTune",
    author = "Stefania Fortino and Petr Hradil",
    note = "Not published in COMPLAS 2013 proceedings; XII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013, COMPLAS 2013 ; Conference date: 03-09-2013 Through 05-09-2013",
    year = "2013",
    language = "English",
    url = "http://new.eccomas.org/wp-content/uploads/sites/2/2018/02/TC-PROCEEDINGS-2013-COMPLAS.pdf",

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    Fortino, S & Hradil, P 2013, 'FEM modelling of wood cell deformation under dynamic loads', XII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013, Barcelona, Spain, 3/09/13 - 5/09/13.

    FEM modelling of wood cell deformation under dynamic loads. / Fortino, Stefania; Hradil, Petr.

    2013. Abstract from XII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013, Barcelona, Spain.

    Research output: Contribution to conference › Conference Abstract › Scientific › peer-review

    TY - CONF

    T1 - FEM modelling of wood cell deformation under dynamic loads

    AU - Fortino, Stefania

    AU - Hradil, Petr

    N1 - Not published in COMPLAS 2013 proceedings

    PY - 2013

    Y1 - 2013

    N2 - Dynamic compressive and shear loads applied to wet woodchips at high values of speed and temperature during thermo-mechanical pulping are aimed at separating wood fibres from the raw material to increase both the flexibility and the bonding ability of the fibres [1,2]. However, further research is needed to deeply understand the complex mechanisms at the origin of wood cell disintegration. Recent studies have pointed out the importance of both experimental and computational research at the microscale of wood to define the properties of this hygroscopic and highly anisotropic material as well as to understand the complex phenomena occurring in wood cells under different processes and environments [3,4]. A Swedish research presented in [1] has provided interesting experimental results in regards to wet wood cell deformation and measurements of the work done under different low speed loads (see references in [2]). A finite element model was also introduced to simulate the deformation of cells in [2]. The present study proposes a flexible FEM tool for Abaqus code based on the data presented in [2]. It uses an automated script for parametric model generation combined with a Vmat user subroutine [5]. The model is able to analyse the influence of different geometrical parameters on the cell wall opening and the effect of contacts among cell walls during loading. Compared to previous FEM models, the influence of the plastic behaviour of wood cells under compression [6] is also investigated. The numerical method provides results in terms of load-displacement curves with the aim to obtain important suggestions for the energy saving during thermo-mechanical pulping processes.

    AB - Dynamic compressive and shear loads applied to wet woodchips at high values of speed and temperature during thermo-mechanical pulping are aimed at separating wood fibres from the raw material to increase both the flexibility and the bonding ability of the fibres [1,2]. However, further research is needed to deeply understand the complex mechanisms at the origin of wood cell disintegration. Recent studies have pointed out the importance of both experimental and computational research at the microscale of wood to define the properties of this hygroscopic and highly anisotropic material as well as to understand the complex phenomena occurring in wood cells under different processes and environments [3,4]. A Swedish research presented in [1] has provided interesting experimental results in regards to wet wood cell deformation and measurements of the work done under different low speed loads (see references in [2]). A finite element model was also introduced to simulate the deformation of cells in [2]. The present study proposes a flexible FEM tool for Abaqus code based on the data presented in [2]. It uses an automated script for parametric model generation combined with a Vmat user subroutine [5]. The model is able to analyse the influence of different geometrical parameters on the cell wall opening and the effect of contacts among cell walls during loading. Compared to previous FEM models, the influence of the plastic behaviour of wood cells under compression [6] is also investigated. The numerical method provides results in terms of load-displacement curves with the aim to obtain important suggestions for the energy saving during thermo-mechanical pulping processes.

    KW - wood cell

    KW - TM pulping

    KW - microscale modelling

    KW - FEM

    KW - ProperTune

    M3 - Conference Abstract

    ER -

    Fortino S, Hradil P. FEM modelling of wood cell deformation under dynamic loads. 2013. Abstract from XII International Conference on Computational Plasticity – Fundamentals and Applications, COMPLAS 2013, Barcelona, Spain.