Creep crack initiation and growth in AISI 316 (N) weld – FEM and experiments
| Autor: | S. Aravindan, S. Amaldhasan, Vibhor Chaswal, P. Johan Singh |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
business.industry Tension (physics) Mechanical Engineering Metals and Alloys Crack tip opening displacement Fracture mechanics Structural engineering Condensed Matter Physics Crack growth resistance curve Finite element method Crack closure Creep Mechanics of Materials Materials Chemistry Ceramics and Composites Fracture (geology) Composite material business |
| Zdroj: | Materials at High Temperatures. 24:57-66 |
| ISSN: | 1878-6413 0960-3409 |
| DOI: | 10.1179/096034007x207606 |
| Popis: | There are two aspects of the creep crack growth behaviour, namely, the crack initiation and the crack propagation. An incubation period is often observed prior to the onset of creep crack growth. In this study, creep crack initiation and propagation in pre-cracked compact tension (CT) specimens of a 316 (N) stainless steel weld at T = 550 and 625°C under static loading is investigated. Both the crack initiation time and the crack growth rate are measured as a function of fracture parameter C*. It is shown that it is possible to correlate the creep crack initiation time with the C* parameter. It is also shown that the creep crack growth rate can be correlated with the C* integral. Additionally, finite element analyses by using the ANSYS software have been performed at one test condition (T=625°C) in order to estimate numerically the crack mouth opening displacement rate history for a propagating crack using the node release technique. When the FEM results are compared with the experimental data, th... |
| Databáze: | OpenAIRE |
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