WHY CONTINUUM DAMAGE IS NONLOCAL: MICROMECHANICS ARGUMENTS

The paper presents two different micromechnamics arguments, each showing that continuum damage ought to be a non-local variable. The first is a modification and improvement of the argument offered in Bazant (1987), which was based on homogenization of the deformation caused by cracking in an elastic solid with a quasi-periodic array of noninteracting small microcracks. The second argument deals with the consequences of interactions among microcracks. Argument I shows that one reason for continuum damages resulting from microcracking to be nonlocal is that the fracturing strain caused by damage is the result of the release of stored energy from a microcrack neighborhood the size of which is not negligible. Argument II shows that the existence of interactions among microcracks implies nonlocaliity. These and other aspects are presented.

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  • Accession Number: 00609206
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1991 12:00AM