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AuthorFernandes, Ralston
AuthorEl-Borgi, Sami
AuthorAhmed, Khaled
AuthorFriswell, Michael I.
AuthorJamia, Nidhal
Available date2021-04-01T12:34:17Z
Publication Date2016
Publication NameAdvanced Modeling and Simulation in Engineering Sciences
ResourceScopus
URIhttp://dx.doi.org/10.1186/s40323-016-0083-7
URIhttp://hdl.handle.net/10576/18069
AbstractThis paper presents a methodology for conducting a 3-D static fracture analysis with applications to a gas turbine compressor blade. An open crack model is considered in the study and crack-tip driving parameters are estimated by using 3-D singular crack-tip elements in ANSYS. The static fracture analysis is verified with a special purpose fracture code (FRANC3D). Once the crack front is perfectly defined and validated, a free vibration study is conducted by analyzing the natural frequencies and modeshapes for both a single blade and bladed disk system. Taking advantage of high performance computing resources, a high fidelity finite element model is considered in the parametric investigation. In the fracture simulation, the influence of the size of a single edged crack as well as the rotational velocity on fracture parameters (stress intensity factors and J-Integral) are evaluated. Results demonstrate that for the applied loading condition, a mixed mode crack propagation is expected. In the modal analysis study, increasing the depth of the crack leads to a decrease in the natural frequencies of both the single blade and bladed disk system, while increasing the rotational velocity increases the natural frequencies. The presence of a crack also leads to mode localization for all mode families, a phenomenon that cannot be captured by a single blade analysis.
SponsorThe authors gratefully acknowledge the support of the Qatar National Research Fund through Grant number NPRP 7-1153-2-432. The authors also thank Texas A&M at Qatar?s Advanced Scientific Computing (TASC) for access to the RAAD Supercomputer.
Languageen
PublisherSpringer
SubjectBladed disk system; Crack; Finite element analysis; Single blade; Singular elements; Static and modal analysis
TitleStatic fracture and modal analysis simulation of a gas turbine compressor blade and bladed disk system
TypeArticle
Issue Number1
Volume Number3
dc.accessType Abstract Only


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