Multi-level uncertain fatigue analysis of a truss under incomplete available information
The present paper deals with the prediction of the fatigue life of a planar tubular truss, when geometrical parameters, material properties, and live loads are non-deterministic. A multi-level calculation uncertainty quantification framework code was designed to aggregate the finite element method a...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2023-10-01
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| Series: | Frattura ed Integrità Strutturale |
| Subjects: | |
| Online Access: | https://www.fracturae.com/index.php/fis/article/view/4238/3852 |
| _version_ | 1797626849187069952 |
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| author | R. B. P. Nonato |
| author_facet | R. B. P. Nonato |
| author_sort | R. B. P. Nonato |
| collection | DOAJ |
| description | The present paper deals with the prediction of the fatigue life of a planar tubular truss, when geometrical parameters, material properties, and live loads are non-deterministic. A multi-level calculation uncertainty quantification framework code was designed to aggregate the finite element method and fatigue-induced sequential failures. Due to the incompleteness of the aleatory-type inputs, the maximum entropy principle was applied. Two sensitivity analyses were performed to report the most influencing factors. In terms of variance, the results suggest that the slope of the curve crack growth rate � stress intensity factor range is the most influencing factor related to fatigue life. Furthermore, due to the application of the entropy concept, the fatigue crack growth boundaries and fatigue crack semi-width boundaries obtained provide the most unbiased fatigue crack design mapping. These boundaries allow the designer to select the worst-case fatigue scenario, besides being able to predict the crack behavior at a required confidence level. |
| first_indexed | 2024-03-11T10:16:02Z |
| format | Article |
| id | doaj.art-b5dcdd238d424821a157a9d18ec33781 |
| institution | Directory Open Access Journal |
| issn | 1971-8993 |
| language | English |
| last_indexed | 2024-03-11T10:16:02Z |
| publishDate | 2023-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Frattura ed Integrità Strutturale |
| spelling | doaj.art-b5dcdd238d424821a157a9d18ec337812023-11-16T08:51:26ZengGruppo Italiano FratturaFrattura ed Integrità Strutturale1971-89932023-10-011766173710.3221/IGF-ESIS.66.0210.3221/IGF-ESIS.66.02Multi-level uncertain fatigue analysis of a truss under incomplete available informationR. B. P. NonatoThe present paper deals with the prediction of the fatigue life of a planar tubular truss, when geometrical parameters, material properties, and live loads are non-deterministic. A multi-level calculation uncertainty quantification framework code was designed to aggregate the finite element method and fatigue-induced sequential failures. Due to the incompleteness of the aleatory-type inputs, the maximum entropy principle was applied. Two sensitivity analyses were performed to report the most influencing factors. In terms of variance, the results suggest that the slope of the curve crack growth rate � stress intensity factor range is the most influencing factor related to fatigue life. Furthermore, due to the application of the entropy concept, the fatigue crack growth boundaries and fatigue crack semi-width boundaries obtained provide the most unbiased fatigue crack design mapping. These boundaries allow the designer to select the worst-case fatigue scenario, besides being able to predict the crack behavior at a required confidence level.https://www.fracturae.com/index.php/fis/article/view/4238/3852fatigue analysisuncertainty quantificationtrussuncertain fatigue analysisincomplete informationmaximum entropy principle |
| spellingShingle | R. B. P. Nonato Multi-level uncertain fatigue analysis of a truss under incomplete available information Frattura ed Integrità Strutturale fatigue analysis uncertainty quantification truss uncertain fatigue analysis incomplete information maximum entropy principle |
| title | Multi-level uncertain fatigue analysis of a truss under incomplete available information |
| title_full | Multi-level uncertain fatigue analysis of a truss under incomplete available information |
| title_fullStr | Multi-level uncertain fatigue analysis of a truss under incomplete available information |
| title_full_unstemmed | Multi-level uncertain fatigue analysis of a truss under incomplete available information |
| title_short | Multi-level uncertain fatigue analysis of a truss under incomplete available information |
| title_sort | multi level uncertain fatigue analysis of a truss under incomplete available information |
| topic | fatigue analysis uncertainty quantification truss uncertain fatigue analysis incomplete information maximum entropy principle |
| url | https://www.fracturae.com/index.php/fis/article/view/4238/3852 |
| work_keys_str_mv | AT rbpnonato multileveluncertainfatigueanalysisofatrussunderincompleteavailableinformation |