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- Title
Interpreting experimental fracture toughness results of quasi-brittle natural materials through multi-parameter approaches.
- Authors
Spagnoli, Andrea; Carpinteri, Andrea; Vantadori, Sabrina
- Abstract
Natural stones like marbles are often employed as façade panels to externally cover buildings. These natural materials tend to exhibit a quasi-brittle nonlinear fracture behaviour which, conversely to concrete counterpart, has much less been studied in the literature. In the present paper, an experimental campaign on the so-called red Verona marble is carried out, and the results are discussed together with some previously published results on the white Carrara marble. The analysis of the two marbles as a whole allows us to discuss size effect and to point out the need for additional parameters in order to describe their fracture behaviour. The study focuses on a two-parameter model which accounts for a characteristic material length. A quantitative correlation between material microstructure features, obtained from thin sections technique, and the characteristic material length is proposed.
- Subjects
FRACTURE toughness; MARBLE; MICROSTRUCTURE; BRITTLE fractures; NONLINEAR elastic fracture
- Publication
Fracture & Structural Integrity / Frattura ed Integrità Strutturale, 2015, Vol 9, p80
- ISSN
1971-8993
- Publication type
Article
- DOI
10.3221/IGF-ESIS.33.11