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- W4387144417 abstract "Abstract Mode-I fatigue crack growth (FCG) simulations are performed for a tangential surface crack initiated at the highest-stress location of the bottom slot surface of a uniaxially-loaded sub-component test specimen. The specimen represents the disk post of a turboshaft engine’s first-stage high-pressure turbine. All three modes of the stress intensity factors (SIFs) along the growing crack fronts are calculated using three-dimensional (3-D) enriched finite elements. However, as the applied uniaxial loading mimics the centrifugal force of the assembled blades, as an approximation to the truly 3-D problem, the crack is initiated and grown in the corresponding tangential plane using only the mode-I SIF distributions in the employed crack growth law. Having computed the new coordinates of all crack front nodes in the original tangential plane, the parameters of the best-fit ellipse are calculated and the finite element model is updated accordingly to contain the incrementally updated new surface crack. The procedure is then, repeated until SIFs reach the fracture toughness. Using the SIFs from the described procedure, the FCG life is also calculated and compared to those obtained from empirical formula-based predictions using the radial and first-principal stress gradients along the possible directions of crack growth and the differences in the results are highlighted." @default.
- W4387144417 created "2023-09-29" @default.
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- W4387144417 date "2023-06-26" @default.
- W4387144417 modified "2023-10-18" @default.
- W4387144417 title "Three-Dimensional Mode-I Fatigue Propagation of a Tangential Surface Crack in a Sub-Component Test Specimen Featuring the Disk Post of a Turboshaft Engine’s First-Stage High-Pressure Turbine" @default.
- W4387144417 doi "https://doi.org/10.1115/gt2023-101766" @default.
- W4387144417 hasPublicationYear "2023" @default.
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