Failure criterion for steel pipe elbows under cyclic loading
| Autor: | Bub-Gyu Jeon, Nam-Sik Kim, Hyoung-Suk Choi, Ehsan Salimi Firoozabad |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Piping
Materials science Computer simulation business.industry Elbow General Engineering 020101 civil engineering 02 engineering and technology Numerical models Structural engineering 0201 civil engineering 020303 mechanical engineering & transports Amplitude medicine.anatomical_structure 0203 mechanical engineering medicine Cyclic loading General Materials Science Low-cycle fatigue Constant (mathematics) business |
| Zdroj: | Engineering Failure Analysis. 66:515-525 |
| ISSN: | 1350-6307 |
| DOI: | 10.1016/j.engfailanal.2016.05.012 |
| Popis: | Steel elbow components are considered to be critical parts in industrial piping system due to their probability of collapse or failure. Therefore, the structural behavior of elbows is considered with respect to failure criteria through experiments and corresponding numerical models. Thirty-eight sets of experiments were conducted on three inch pipe elbow specimens. The numerical simulation results of the specimens are in good agreement with the test results. Damage indices available in the literature are used for failure estimation of the elbows. We suggest that the damage calculated using the Park and Ang damage index, and the Banon damage index, based on only one failed specimen under any constant amplitude cyclic loading, can be defined as the failure point and used to predict the failure of the component under other loading amplitudes. Therefore, the low cycle fatigue curve of an elbow can be derived using these simulation results. We also found that the calculated damage of an elbow component under constant, non-constant, and fully or partial amplitude reversals is quite similar. |
| Databáze: | OpenAIRE |
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