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Grigorjevs, Pavels (2018) Study of size effect in Titanium Aluminide with the weakest link Weibull model. DLR-Interner Bericht. DLR-IB-SG-AX-2018-252. Master's. Deutsches Zentrum für Luft- und Raumfahrt. 13 S. (Unpublished)
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Abstract
In this work quantitative analysis of the weakest link Weibull model for studying size effect phenomena in $\gamma$-Titanium Aluminide (TiAl) alloys is made. This quasi-brittle material is very attractive for industry because of its mechanical properties like specific strength and oxidation resistance, which makes this material attractive for gas turbine applications. The goal of this work is to compare different weakest link theories and find the value of Weibull modulus from the experimental data of size effect of TiAl alloys. To calculate Weibull modulus, two methods are used - Least Squares Estimation (LSE) and Maximum likelihood Estimation (MLE), which are different in their mathematical formulation. In this work, we review four theories based on weakest link Weibull model, of which three were implemented and tested in MATLAB. We make quantitative comparisons of the predictive capabilities of three methods using the available experimental data.
| Item URL in elib: | https://elib.dlr.de/125554/ | ||||||
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| Document Type: | Monograph (DLR-Interner Bericht, Master's) | ||||||
| Title: | Study of size effect in Titanium Aluminide with the weakest link Weibull model | ||||||
| Authors: |
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| Date: | 21 December 2018 | ||||||
| Refereed publication: | No | ||||||
| Open Access: | No | ||||||
| Gold Open Access: | No | ||||||
| In SCOPUS: | No | ||||||
| In ISI Web of Science: | No | ||||||
| Number of Pages: | 13 | ||||||
| Status: | Unpublished | ||||||
| Keywords: | Size effect, Failure probability, Titanium Aluminide | ||||||
| Institution: | Deutsches Zentrum für Luft- und Raumfahrt | ||||||
| Department: | Institut für Test und Simulation für Gasturbinen | ||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||
| HGF - Program: | Aeronautics | ||||||
| HGF - Program Themes: | propulsion systems | ||||||
| DLR - Research area: | Aeronautics | ||||||
| DLR - Program: | L ER - Engine Research | ||||||
| DLR - Research theme (Project): | L - Virtual Engine and Validation methods (old) | ||||||
| Location: | Augsburg | ||||||
| Institutes and Institutions: | Institute of Test and Simulation for Gas Turbines | ||||||
| Deposited By: | Raina, Dr.-Ing. Arun | ||||||
| Deposited On: | 09 Jan 2020 09:08 | ||||||
| Last Modified: | 09 Jan 2020 09:08 |
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