A multi fractal analysis of size effect on fatigue crack growth

Title: A multi fractal analysis of size effect on fatigue crack growth
Author(s): A. Carpinteri, A. Spagnoli, S. Vantadori
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 881 - 889
Total Pages: 9
Nb references: 17
Language: English

Abstract: Strength of materials is influenced by both the specimen (or structure) size and the material microstructure. In particular, several experimental tests have shown a decrease of the material strength under static or fatigue loading by increasing the structure size with respect to the size of the material microstructure. As far as fatigue crack growth is concerned, limited information on size effect is available in the literature. In the present paper, by exploiting some concepts of fractal geometry, a definition of stress intensity factor based on physical dimensions different from the classical ones is discussed. Then, a multifractal size-dependent fatigue crack growth law (expressing crack growth rate against stress intensity factor range) is proposed. Finally, such a law is used to interpret relevant experimental data related to concrete.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00