Compact tension fracture specimen: Experimental and computational implementations on stress intensity factor

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

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

Revista

Título: Journal of Strain Analysis for Engineering Design

Vol. 53

Páginas: 630-647

ISSN: 0309-3247

Editora: SAGE

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 12 Citações

Outras Informações

ID Authenticus: P-00P-ZNX

DOI: 10.1177/0309324718763189

Abstract (EN): This work concentrates on the characterization of the stress intensity factor range for a compact tension specimen tested under a uniaxial tensile fatigue loading condition. The experimental solution is obtained using a three-dimensional full-field optical technique, digital image correlation. The deformation field is measured and documented for distinct crack lengths. As a relevant fracture parameter, stress intensity factor is thus experimentally measured combined with a computational overdeterministic algorithm for different crack lengths. Moreover, to verify the performance of the proposed fracture model, the cracked compact tension specimen is elasto-statically resolved using advanced discretization techniques, such as the finite element method, the meshless radial point interpolation method and the meshless natural neighbour radial point interpolation method. The finite element method model is thereby analysed with ABAQUS((c)) to enable computation of mode I stress intensity factor results based on strain energy release rate criterion for different crack measurements in addition to strain contours. Likewise, the resolution pattern is repeated for meshless methods, and analogous numerical solutions are thus obtained. Overall, the experimental and numerical stress intensity factor results are compared with an available solution (ASTM E647) exhibiting a reasonable agreement. The novelty of this investigation is the amalgamation of an experimental digital image correlation procedure with a computational overdeterministic algorithm and, most importantly, the meshless formulation performance in the linear elastic fracture mechanics.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 18