Failure prediction in forming processes

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2007

Autores

de sa, jmac (Autor) FEUP; zheng, c (Autor) Outra

Ata de Conferência Internacional

Título: NUMIFORM 07 - Materials Processing and Design: Modeling, Simulation and Applications

Páginas: 245-250

NUMIFORM 07- The 9th International Conference on Numerical Methods in Industrial Forming Processes

Porto, Portugal, 17-21 June 2007

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-004-E31

DOI: 10.1063/1.2740819

Abstract (EN): A non-local model for material softening, in which the internal dissipative variable adopted is the damage, is implemented. The ductile damage model utilised is based on an enhanced Lemaitre model which includes a clear distinction between damage evolution for compressive and tensile stress states. The model adopted is an implicit gradient model in which the non-local damage is implicitly defined through a Helmholtz differential equation in which the diffusion coefficient is a length scale parameter and the difference between the local and non-local damage fields is the source term. The performance of local and non-local models are compared in large deformation problems, specially in what respects the problem of mesh dependence.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6