Experimental characterization of a reactor nozzles injetores of fast pirolise to waste conversion in refineries / Caracterização experimental de bicos injetores de um reator de pirolise rapida para conversão de residuo em refinarias

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This thesis presents an analysis of problems of linear elastic fracture mechanics in anisotropic bimaterial structures. Using the boundary element method, it is possible to evaluate stress intensity factors in plane problems (2D) due to the presence of interfacial cracks between the laminae that constitute the material, when the structure is submitted to a mode I or in mixed mode loading. The problem is modeled using the subregion technique to describe each one of the different subdomains, represented by each material. On the interface of subregions, which the domain is divided, conditions of tractions equilibrium and displacements continuity are imposed, except in the corresponding crack region. The singular behavior presented by the stress field near the crack tip is modeled by traction singular quarter point element. Numerical examples of problems with in-plane loading are presented. Mesh convergence analyses are also presented, showing little dependence on the discretization even when coarse meshes were used. Some of these examples have correspondents in literature, that were used for comparisons with the obtained results. A good agreement in the comparisons of results was observed.

ASSUNTO(S)

pyrolysis petroleum petroleo - refinarias pirolise

ACESSO AO ARTIGO

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