Dissertação de Mestrado
Análise viscoelástica e viscoplástica de sólidos bidimensionais pelo método dos elementos de contorno
Fecha
2010-12-06Autor
Filipe Emanuel Souza Anacleto
Institución
Resumen
In the current work two time-dependent boundary element method (BEM) formulations are shown. The rst one is developed to an analysis on a viscoelastic media. The Kelvin-Voigt viscoelastic material model is chosen to simulate the timedependent behavior. The second one deals with an analysis on a multi-region viscoplastic media. An elasto/viscoplastic material model is chosen alongside Perzyna'sow rule to simulate the time-dependent behavior. A procedure to automatic generate cells in the zones of the domain that yielded is used. To deal with the multiple regions problem, a technique known as stiness matrix method is used. Examples using both formulations are analyzed and the results are compared with the exact and Finite Element Method (FEM) results. Keywords: boundary element method, viscoelasticity, viscoplasticity, automatic cell generation, multi-regions.