A novel two-stage discrete crack method based on the screened Poisson equation and local mesh refinement

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

areias, pma (Autor) Outra; Rabczuk, T (Autor) Outra; José César de Sá (Autor) FEUP

Revista

Título: Computational Mechanics

Vol. 58

Páginas: 1003-1018

ISSN: 0178-7675

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 38 Citações

Scopus - 43 Citações

Outras Informações

ID Authenticus: P-00K-X81

DOI: 10.1007/s00466-016-1328-5

Abstract (EN): We propose an alternative crack propagation algorithm which effectively circumvents the variable transfer procedure adopted with classical mesh adaptation algorithms. The present alternative consists of two stages: a mesh-creation stage where a local damage model is employed with the objective of defining a crack-conforming mesh and a subsequent analysis stage with a localization limiter in the form of a modified screened Poisson equation which is exempt of crack path calculations. In the second stage, the crack naturally occurs within the refined region. A staggered scheme for standard equilibrium and screened Poisson equations is used in this second stage. Element subdivision is based on edge split operations using a constitutive quantity (damage). To assess the robustness and accuracy of this algorithm, we use five quasi-brittle benchmarks, all successfully solved.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16