Material Model for Anisotropic Viscoelasticity at Finite Deformations Applied to Pulp Fibres

Research output: ThesisMaster's ThesisResearch

Abstract

The goal of this thesis is to find a material model that is capable of describing the
behaviour of a pulp fibre. In the first major part of this thesis a general introduction to finite element analysis is given and the constitutive equations of the used material model are described. In the second major part the calibration of the material model parameters with nano indentation experiments is outlined.

An anisotropic viscoelastic material model for finite deformations is implemented into a finite element Matlab source code SOOFEA and in a user subroutine of ABAQUS. This implementation is then used to simulate nano indentations experiments. By iteratively adapting the material parameters the simulation results are fitted to the real experimental values. With that proceedure the material parameters can be calibrated.
LanguageGerman
QualificationMaster of Science
Awarding Institution
  • Institute of Strength of Materials (3040)
Supervisors/Advisors
  • Ulz, Manfred Hannes, Supervisor
  • Hirn, Ulrich, Supervisor
Thesis sponsors
StatusPublished - Nov 2017

Keywords

    Cite this

    Seidlhofer, T 2017, 'Material Model for Anisotropic Viscoelasticity at Finite Deformations Applied to Pulp Fibres', Master of Science, Institute of Strength of Materials (3040).
    @phdthesis{3797a8e140dc49e2b78d5728db62d343,
    title = "Material Model for Anisotropic Viscoelasticity at Finite Deformations Applied to Pulp Fibres",
    abstract = "The goal of this thesis is to find a material model that is capable of describing thebehaviour of a pulp fibre. In the first major part of this thesis a general introduction to finite element analysis is given and the constitutive equations of the used material model are described. In the second major part the calibration of the material model parameters with nano indentation experiments is outlined.An anisotropic viscoelastic material model for finite deformations is implemented into a finite element Matlab source code SOOFEA and in a user subroutine of ABAQUS. This implementation is then used to simulate nano indentations experiments. By iteratively adapting the material parameters the simulation results are fitted to the real experimental values. With that proceedure the material parameters can be calibrated.",
    keywords = "Nano Indentation , AFM, Pulp Fibres, Inverse Problem, Material Parameter Estimation, Finite Element Method, Finite Deformation, Hyperelasticity, Viscoelasticity, Anisotropy, Orthotropy, Structural Tensors, ABAQUS-UMAT, MATLAB-FEM, Dissipation Energy, Contact Problem",
    author = "Tristan Seidlhofer",
    year = "2017",
    month = "11",
    language = "deutsch",
    school = "Institut f{\"u}r Festigkeitslehre (3040)",

    }

    TY - THES

    T1 - Material Model for Anisotropic Viscoelasticity at Finite Deformations Applied to Pulp Fibres

    AU - Seidlhofer, Tristan

    PY - 2017/11

    Y1 - 2017/11

    N2 - The goal of this thesis is to find a material model that is capable of describing thebehaviour of a pulp fibre. In the first major part of this thesis a general introduction to finite element analysis is given and the constitutive equations of the used material model are described. In the second major part the calibration of the material model parameters with nano indentation experiments is outlined.An anisotropic viscoelastic material model for finite deformations is implemented into a finite element Matlab source code SOOFEA and in a user subroutine of ABAQUS. This implementation is then used to simulate nano indentations experiments. By iteratively adapting the material parameters the simulation results are fitted to the real experimental values. With that proceedure the material parameters can be calibrated.

    AB - The goal of this thesis is to find a material model that is capable of describing thebehaviour of a pulp fibre. In the first major part of this thesis a general introduction to finite element analysis is given and the constitutive equations of the used material model are described. In the second major part the calibration of the material model parameters with nano indentation experiments is outlined.An anisotropic viscoelastic material model for finite deformations is implemented into a finite element Matlab source code SOOFEA and in a user subroutine of ABAQUS. This implementation is then used to simulate nano indentations experiments. By iteratively adapting the material parameters the simulation results are fitted to the real experimental values. With that proceedure the material parameters can be calibrated.

    KW - Nano Indentation

    KW - AFM

    KW - Pulp Fibres

    KW - Inverse Problem

    KW - Material Parameter Estimation

    KW - Finite Element Method

    KW - Finite Deformation

    KW - Hyperelasticity

    KW - Viscoelasticity

    KW - Anisotropy

    KW - Orthotropy

    KW - Structural Tensors

    KW - ABAQUS-UMAT

    KW - MATLAB-FEM

    KW - Dissipation Energy

    KW - Contact Problem

    M3 - Masterarbeit

    ER -