CINECA IRIS Institutional Research Information System
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishThis paper analyses the issue of defect nucleation due to fatigue loading in notched components where cracks occur in the proximity of the zone where the major stress gradient occurs. On the basis of recent experimental results where the defects do not nucleate at the notch tip, the effective stress evaluated by means of the implicit gradient approach, can explain the reasons for this apparent discrepancy. Furthermore, in order to find a kind of notch that underlines the nucleation outside the maximum stress zone, rectangular lateral notches have been investigated. Rectangular notches could provide an interesting theoretical and experimental benchmark or reference case in order to validate effective stress definitions. The linear elastic stress field at edges, corners and in the surrounding material of rectangular, sharp or rounded lateral notches has been analysed by means of the implicit gradient approach. The consequent effective values of these notches are evaluated in relation to brittle fractures or their predicted fatigue strength values.
| Data di pubblicazione: | 2016 | |
| Titolo: | Evaluation of effective stress along the border of lateral notches | |
| Autori: | Maggiolini, Enrico; Tovo, Roberto; Livieri, Paolo | |
| Rivista: | FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | |
| Keywords: | equivalent stress; implicit gradient; local field; stress analysis, notches; Materials Science (all); Mechanics of Materials; Mechanical Engineering; | |
| Abstract in inglese: | This paper analyses the issue of defect nucleation due to fatigue loading in notched components where cracks occur in the proximity of the zone where the major stress gradient occurs. On the basis of recent experimental results where the defects do not nucleate at the notch tip, the effective stress evaluated by means of the implicit gradient approach, can explain the reasons for this apparent discrepancy. Furthermore, in order to find a kind of notch that underlines the nucleation outside the maximum stress zone, rectangular lateral notches have been investigated. Rectangular notches could provide an interesting theoretical and experimental benchmark or reference case in order to validate effective stress definitions. The linear elastic stress field at edges, corners and in the surrounding material of rectangular, sharp or rounded lateral notches has been analysed by means of the implicit gradient approach. The consequent effective values of these notches are evaluated in relation to brittle fractures or their predicted fatigue strength values. | |
| Digital Object Identifier (DOI): | 10.1111/ffe.12452 | |
| Handle: | http://hdl.handle.net/11392/2365917 | |
| Appare nelle tipologie: | 03.1 Articolo su rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| maggiolini2016.pdf | Post-print | PUBBLICO - Pubblico con Copyright | Open Access Visualizza/Apri | |
| ffe.12452.pdf | Full text (versione editoriale) | NON PUBBLICO - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11392/2365917
Copyright © 2022