Since the introduction of the smeared crack concept for use in the finite-element fracture analysis, various material models have been developed. The majority of these models, usually deemed single or multiple crack models, are based on a linear elastic material constitutive law coupled in series with a softening crack-bridging law. The crack-bridging law on the plane where tensile fracture occurs, while defined by stresses and strains, is generally the same vectorial relation employed in the discrete crack approach. Problems associated with these models are due to the nonconsistency of the basic hypothesis and sharp discontinuities in the resulting material behavior. This paper analyzes the problems and compares them with concepts and results coming from the nonlocal microplane material model. Numerical studies on the material and finite-element level using both approaches are detailed.


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  • Accession Number: 00726928
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 9 1996 12:00AM