Numerical Modeling and Determination Fracture Mechanics Parameters
نویسندگان
چکیده
This contributions outlines the main features of the cohesive cracks as they were conceived by Hillerborg: as a ~onstitutive model able to describe the generation of a progressively fracturing surface and its evolution up to complete failure. After outlining the basic hypotheses, the numerical tools available for structural analysis are examined, including the simplest approximations reducing the problem to effective elastic crack formulations. Then the experimental procedures are summarized that are required to characterize a given material, with particular emphasis on the simplified procedure developed to fit a bilinear softening curve to experimental load-CMOD curves of notched specimens. A few about the various problems that are still open close the contribution.
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