Crack propagation under variable amplitude loading
| Autor: | Zemri Mokhtar, Amrouche Abdelwaheb, Mazari Mohamed, Miloudi Abdelkader, Benguediab Mohamed |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
business.industry Mechanical Engineering overload crack underload Fracture mechanics residual stress Structural engineering Condensed Matter Physics Residual Crack growth resistance curve Finite element method plastic zone Crack closure Amplitude Mechanics of Materials Residual stress mental disorders TA401-492 General Materials Science business Phenomenology (psychology) Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Materials Research v.16 n.5 2013 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL Materials Research, Volume: 16, Issue: 5, Pages: 1161-1168, Published: 05 JUL 2013 Materials Research, Vol 16, Iss 5, Pp 1161-1168 (2013) |
| Popis: | Experience shows that a damage induced by a given cycle is dependent on the loading history. In this regard, the objective of this paper is to study and describe the phenomenology of the loading history on crack propagation. Different loading configuration has been considered for fatigue crack propagation of XC38 steel; overload cycles followed by underload and vice versa were considered during propagation. Measure of crack opening has been made using compliance method. It is shown that the main parameters which cause retardation are the residual compressive stresses and the crack closure. The finite element modeling is used to calculate the evolution of residual stress profiles before and after application of the overload-underload cycle. It corroborates the hypotheses on the mechanisms behind, including those proposed on the residual stresses at the crack tip. |
| Databáze: | OpenAIRE |
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