Size effect in quasibrittle fracture: Theoretical study and CZM simulations

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

Dourado, N (Author) Other; Morel, S (Author) Other; De Moura, MFSF (Author) FEUP; Valentin, G (Author) Other; Morais, J (Author) Other

Conference proceedings International

Title: 12th International Conference on Fracture 2009, ICF-12

Pages: 1909-1918

12th International Conference on Fracture 2009, ICF-12

Ottawa, ON, 12 July 2009 through 17 July 2009

Indexing

ISI Web of Knowledge

Scopus - 0 Citations

Other information

Authenticus ID: P-008-7FM

Abstract (EN): Within the framework of Ba¸ant's theory, the size effect on the ultimate fracture properties of geometrically similar notched structures is studied from an energy based asymptotic analysis in which the Resistance-curve behaviour is considered through an analytic expression. The scaling of the relative crack length at peak load as well as the size effect on the corresponding resistance to crack growth are investigated. If the size effects obtained for small and large sizes are in agreement with SEL's predictions, it is shown that, for intermediate structure sizes, there exists an additional asymptotic regime instead of a simple crossover regime as expected in SEL. The existence of this new asymptotic regime is proved from the results obtained from numerical simulations of geometrically similar notched structures of different sizes using the Cohesive Zone Modelling (CZM).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10