A computational method for crack growth in glulam under variable humidity

Antonio Lorenzo Mendicino, Stefania Fortino, Maximilian Henning, Gerhard Dill-Langer

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    This paper presents a three-dimensional orthotropic-viscoelastic model for the analysis of cracked glulam structures under short-term loading or sustained loads. Both conditions of constant and variable humidity are analyzed. Kelvin-type elemental deformations are used for describing the viscoelastic creep and the whole constitutive model is implemented into the Umat user subroutine of Abaqus FEM code. The crack growth simulation under short-term loading is done by using a suitable exponential damage law and the cohesive elements of Abaqus in the fracture process zone. The proposed computational approach is validated by analyzing glued laminated (glulam) specimens under opening mode and the numerical load-displacement curves are compared with both literature results and experimental data obtained in the context of the present research. For long-term fracture tests under sustained loads and constant moisture content, a criterion of crack initiation based on a viscoelastic integral parameter is also introduced. Both the proposed constitutive model and the computational approach can be further extended to cases of crack propagation in the presence of variable humidity conditions.
    Original languageEnglish
    Title of host publicationWCTE 2010, World Conference on Timber Engineering
    Subtitle of host publicationConference Proceedings
    Place of PublicationTrento, Italy
    Number of pages9
    Publication statusPublished - 2010
    MoE publication typeNot Eligible
    Event11th World Conference on Timber Engineering, WCTE 2010 - Riva del Garda, Italy
    Duration: 20 Jun 201024 Jun 2010
    Conference number: 11

    Conference

    Conference11th World Conference on Timber Engineering, WCTE 2010
    Abbreviated titleWCTE 2010
    CountryItaly
    CityRiva del Garda
    Period20/06/1024/06/10

    Fingerprint

    Computational methods
    Constitutive models
    Crack propagation
    Atmospheric humidity
    Subroutines
    Crack initiation
    Creep
    Moisture
    Finite element method

    Keywords

    • Mode I and Mode II crack growth
    • glulam
    • cohesive elements
    • moisture-stress analysis
    • J integral
    • FEM
    • Abaqus

    Cite this

    Mendicino, A. L., Fortino, S., Henning, M., & Dill-Langer, G. (2010). A computational method for crack growth in glulam under variable humidity. In WCTE 2010, World Conference on Timber Engineering: Conference Proceedings Trento, Italy.
    Mendicino, Antonio Lorenzo ; Fortino, Stefania ; Henning, Maximilian ; Dill-Langer, Gerhard. / A computational method for crack growth in glulam under variable humidity. WCTE 2010, World Conference on Timber Engineering: Conference Proceedings. Trento, Italy, 2010.
    @inproceedings{40862b8e934c4315a9634362504017d4,
    title = "A computational method for crack growth in glulam under variable humidity",
    abstract = "This paper presents a three-dimensional orthotropic-viscoelastic model for the analysis of cracked glulam structures under short-term loading or sustained loads. Both conditions of constant and variable humidity are analyzed. Kelvin-type elemental deformations are used for describing the viscoelastic creep and the whole constitutive model is implemented into the Umat user subroutine of Abaqus FEM code. The crack growth simulation under short-term loading is done by using a suitable exponential damage law and the cohesive elements of Abaqus in the fracture process zone. The proposed computational approach is validated by analyzing glued laminated (glulam) specimens under opening mode and the numerical load-displacement curves are compared with both literature results and experimental data obtained in the context of the present research. For long-term fracture tests under sustained loads and constant moisture content, a criterion of crack initiation based on a viscoelastic integral parameter is also introduced. Both the proposed constitutive model and the computational approach can be further extended to cases of crack propagation in the presence of variable humidity conditions.",
    keywords = "Mode I and Mode II crack growth, glulam, cohesive elements, moisture-stress analysis, J integral, FEM, Abaqus",
    author = "Mendicino, {Antonio Lorenzo} and Stefania Fortino and Maximilian Henning and Gerhard Dill-Langer",
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    Mendicino, AL, Fortino, S, Henning, M & Dill-Langer, G 2010, A computational method for crack growth in glulam under variable humidity. in WCTE 2010, World Conference on Timber Engineering: Conference Proceedings. Trento, Italy, 11th World Conference on Timber Engineering, WCTE 2010, Riva del Garda, Italy, 20/06/10.

    A computational method for crack growth in glulam under variable humidity. / Mendicino, Antonio Lorenzo; Fortino, Stefania; Henning, Maximilian; Dill-Langer, Gerhard.

    WCTE 2010, World Conference on Timber Engineering: Conference Proceedings. Trento, Italy, 2010.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    TY - GEN

    T1 - A computational method for crack growth in glulam under variable humidity

    AU - Mendicino, Antonio Lorenzo

    AU - Fortino, Stefania

    AU - Henning, Maximilian

    AU - Dill-Langer, Gerhard

    N1 - Project code: 17546

    PY - 2010

    Y1 - 2010

    N2 - This paper presents a three-dimensional orthotropic-viscoelastic model for the analysis of cracked glulam structures under short-term loading or sustained loads. Both conditions of constant and variable humidity are analyzed. Kelvin-type elemental deformations are used for describing the viscoelastic creep and the whole constitutive model is implemented into the Umat user subroutine of Abaqus FEM code. The crack growth simulation under short-term loading is done by using a suitable exponential damage law and the cohesive elements of Abaqus in the fracture process zone. The proposed computational approach is validated by analyzing glued laminated (glulam) specimens under opening mode and the numerical load-displacement curves are compared with both literature results and experimental data obtained in the context of the present research. For long-term fracture tests under sustained loads and constant moisture content, a criterion of crack initiation based on a viscoelastic integral parameter is also introduced. Both the proposed constitutive model and the computational approach can be further extended to cases of crack propagation in the presence of variable humidity conditions.

    AB - This paper presents a three-dimensional orthotropic-viscoelastic model for the analysis of cracked glulam structures under short-term loading or sustained loads. Both conditions of constant and variable humidity are analyzed. Kelvin-type elemental deformations are used for describing the viscoelastic creep and the whole constitutive model is implemented into the Umat user subroutine of Abaqus FEM code. The crack growth simulation under short-term loading is done by using a suitable exponential damage law and the cohesive elements of Abaqus in the fracture process zone. The proposed computational approach is validated by analyzing glued laminated (glulam) specimens under opening mode and the numerical load-displacement curves are compared with both literature results and experimental data obtained in the context of the present research. For long-term fracture tests under sustained loads and constant moisture content, a criterion of crack initiation based on a viscoelastic integral parameter is also introduced. Both the proposed constitutive model and the computational approach can be further extended to cases of crack propagation in the presence of variable humidity conditions.

    KW - Mode I and Mode II crack growth

    KW - glulam

    KW - cohesive elements

    KW - moisture-stress analysis

    KW - J integral

    KW - FEM

    KW - Abaqus

    M3 - Conference article in proceedings

    BT - WCTE 2010, World Conference on Timber Engineering

    CY - Trento, Italy

    ER -

    Mendicino AL, Fortino S, Henning M, Dill-Langer G. A computational method for crack growth in glulam under variable humidity. In WCTE 2010, World Conference on Timber Engineering: Conference Proceedings. Trento, Italy. 2010