Interpreting experimental fracture toughness results of quasi-brittle natural materials through multi-parameter approaches
Journal Title: Frattura ed Integrità Strutturale - Year 2015, Vol 9, Issue 33
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.
Authors and Affiliations
Andrea Spagnoli, Sabrina Vantadori
Keywords
Related Articles
- EP ID EP158571
- DOI 10.3221/IGF-ESIS.33.11
- Views 105
- Downloads 0
Limit analysis on FRP-strengthened RC members
Reinforced concrete (RC) members strengthened with externally bonded fiber-reinforced-polymer(FRP) plates are numerically investigated by a plasticity-based limit analysis approach. The key-concept of thepresent ap...
Studio del danneggiamento mediante tomografia in luce del sincrotrone: impatto di un cono d’ombra sulla qualità finale delle ricostruzioni
Un’accurata osservazione della geometria tridimensionale di cricche e difetti è necessaria per lo studio dei meccanismi alla base del processo di danneggiamento. I metodi convenzionali utilizzati a questo scopo sono dist...
Complexity: a new paradigm for fracture mechanics
The so-called Complexity Sciences are a topic of fast growing interest inside the scientific community. Actually, researchers did not come to a definition of complexity, since it manifests itself in so many different way...
Experimental examination of fatigue life of welded joint with stress concentration
This paper presents results of experimental examinations of stress concentration influence to fatigue life of butt welded joints with K-groove, produced from the most frequently used structural steel S355J2+N...
Numerical analysis of hydrogen-assisted rolling-contact fatigue of wind turbine bearings
Offshore wind parks at locations further from the shore often involve serious difficulties, e.g. the maintenance. The bearings of offshore wind turbines are prone to suffer hydrogen-assisted rolling-contact fatig...