Stress intensity factor calculation through thermoelastic stress analysis, finite element and RPIM meshless method

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

Farahani, BV (Autor) Outra; Tavares, PJ (Autor) Outra; Moreira, PMGP (Autor) Outra; Jorge Belinha (Autor) FEUP

Revista

Título: Engineering Fracture Mechanics

Vol. 183

Páginas: 66-78

ISSN: 0013-7944

Editora: Elsevier

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 25 Citações

Outras Informações

ID Authenticus: P-00N-5PE

DOI: 10.1016/j.engfracmech.2017.04.027

Abstract (EN): This work aims at determining the stress intensity factor (SIF) for a compact tension specimen (CT) during a fatigue crack growth test with Thermoelastic Stress Analysis (TSA). Additionally, the problem is addressed using advanced discretization techniques, Radial Point Interpolation Meshless method (RPIM) and Finite Element Method (FEM) to obtain a stress distribution and calculate SIF range. Based on an optimization procedure, a functional stress relation was designated where the TSA analysis relies upon. The stress fields obtained with the FEM and the RPIM, are graphically represented and both methodologies are compared with the experimental TSA analysis in the presence of mode I fatigue loading test. The stress field in front of the crack tip is obtained with TSA and used in Williams series expansion, together with an overdeterministic algorithm to compute the SIF under mode I loading. This proposed procedure possesses a hybrid experimental-computational feature in which the SIF determination hinges on a stress field obtained with an optical technique, TSA. The robustness of the numerical FE and RPIM computations were thereby experimentally validated with the achieved SIF solution.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13