Size effects on crack growth are of paramount importance on the fatigue problem. Paris’ and Wöhler’s fatigue curves exhibit scale effects, which can be explained in the framework of incomplete self-similarity and fractal geometry concepts. In particular, scaling laws are found for the main fatigue parameters, that is, the fatigue threshold ΔKth and the fatigue limit Δσfl. The fatigue threshold increases with the crack length, whereas the fatigue limit decreases with the specimen size. Eventually, the proposed models are positively compared to experimental data available in the literature.

Scaling and fractality in fatigue crack growth: Implications to Paris’ law and Wöhler’s curve / Carpinteri, Alberto; Montagnoli, Francesco. - In: PROCEDIA STRUCTURAL INTEGRITY. - ISSN 2452-3216. - 14:(2019), pp. 957-963. (Intervento presentato al convegno 2nd International Conference on Structural Integrity and Exhibition 2018 tenutosi a Hyderabad (India) nel 25 July 2018 through 27 July 2018) [10.1016/j.prostr.2019.07.077].

Scaling and fractality in fatigue crack growth: Implications to Paris’ law and Wöhler’s curve

Alberto Carpinteri;MONTAGNOLI, FRANCESCO
2019

Abstract

Size effects on crack growth are of paramount importance on the fatigue problem. Paris’ and Wöhler’s fatigue curves exhibit scale effects, which can be explained in the framework of incomplete self-similarity and fractal geometry concepts. In particular, scaling laws are found for the main fatigue parameters, that is, the fatigue threshold ΔKth and the fatigue limit Δσfl. The fatigue threshold increases with the crack length, whereas the fatigue limit decreases with the specimen size. Eventually, the proposed models are positively compared to experimental data available in the literature.
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S2452321619301957-main.pdf

accesso aperto

Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Creative commons
Dimensione 673.26 kB
Formato Adobe PDF
673.26 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2751326
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo