STP995V1: Nonlinear Fracture of Concrete and Ceramics

    Kobayashi, AS
    Professor, and postdoctoral research associate, University of,

    Du, J-J
    Professor, and postdoctoral research associate, University of,

    Hawkins, NM
    Professor, University,

    Bradt, RC
    Professor, University of Washington, Seattle, WA

    Pages: 15    Published: Jan 1988


    Abstract

    The nonlinear fracture process zones in an impacted unnotched concrete bend specimen, a prenotched ceramic bend specimen, and an unnotched ceramic/ceramic composite bend specimen were estimated through hybrid experimental numerical analysis. Aggregate bridging in concrete, particulate bridging in ceramics, and fiber bridging in ceramic/ceramic composite are modeled by Barenblatt-type cohesive zones which are incorporated into the finite-element models of the bend specimens. Both generation and propagation analyses are used to estimate the distribution of crack closure stresses in the nonlinear fracture process zones. The finite-element models are then used to simulate fracture tests consisting of rapid crack propagation in an impacted concrete bend specimen, and stable crack growth and strain softening in a ceramic and a ceramic/ceramic composite bend specimens.

    Keywords:

    concrete, ceramics, ceramic composite, fracture process zone, aggregate bridging, impact, finite element, fracture mechanics, nonlinear fracture mechanics


    Paper ID: STP26789S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP26789S


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