Publicou 6 edições por ano
ISSN Imprimir: 1543-1649
ISSN On-line: 1940-4352
Indexed in
CONTINUUM TO DISCONTINUUM TRANSITION DURING FAILURE IN NONLOCAL DAMAGE MODELS
RESUMO
The purpose of this paper is to discuss how boundary and emerging boundary effects can be folded into a new nonlocal damage formulation based on integral models that provides a consistent transition toward discrete cracking. Several enhancements of the original nonlocal damage model inspired from micromechanics of interacting defects are considered. The goals of the modified nonlocal formulation are threefold: (i) the distribution of damage at failure should be mesh independent; (ii) the model should be able to capture the continuous-discontinuous transition involved in the process of failure due to increasing stresses; (iii) the discontinuous displacements fields resulting from complete failure should be approached as closely as possible. A 1D example illustrates the capabilities of the original and enhanced models. It is found that a combination of increasing/decreasing interactions and nonlocal effects during failure provides the most suitable results.
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