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    Finite Element Analysis of Concrete Fracture Specimens

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    Issue Date
    1984-05
    Author
    Leibengood, Linda D.
    Darwin, David
    Dodds, Robert H., Jr
    Publisher
    University of Kansas Center for Research, Inc.
    Type
    Technical Report
    Is part of series
    SM Report;11
    Published Version
    https://iri.ku.edu/reports
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    Abstract
    The effects of the descending branch of the tensile stress-strain curve, fracture energy, grid refinement, and load-step size on the response of finite element models of notched concrete beams are studied. The width of the process zone and constraint of crack angles are investigated. Nonlinearity is 1 imited to cracking of the concrete. A limiting tensile stress criterion governs crack initiation. Concrete is represented as linear elastic prior to cracking. Cracks are modeled using a smeared representaion. The post-cracking behavior is controlled by the shape of the descending branch, fracture energy, crack angle, and element size. Unloading occurs at a slope equal to the i nitia 1 modulus of the material. load deflection curves and cracking patterns are used to evaluate the beam's response. Comparisons of the process zone size are made. All analyses are performed on a 200 x 200 x GOO mm concrete beam, with an initial notch length of 80 mm. The fracture energy, tensile strength, and shape of the descending branch interact to determine the stiffness and general behavior of the specimen. The width of the process zone has a negligible influence on the beam's response. The importance of proper crack orientation is demonstrated. The model is demonstrated to be objective with respect to grid refinement and load-step size.
    URI
    http://hdl.handle.net/1808/20346
    Collections
    • Infrastructure Research Institute Scholarly Works [324]
    Citation
    Leibengood, L.D., Darwin, D., and Dodds, R.H., "Finite Element Analysis of Concrete Fracture Specimens," SM Report No. 11, University of Kansas Center for Research, Inc., Lawrence, Kansas, May 1984, 128 pp.

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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