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Isothermal and thermomechanical fatigue crack growth tests up to and above the maximum usage temperature for Inconel 718, nominally, 650°C, were executed to characterize the impact of time spent at elevated temperature on the fatigue crack growth ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab5ad91e7e2478e3a86cdc4f1922e5ec
https://doi.org/10.22541/au.165047409.90373353/v1
https://doi.org/10.22541/au.165047409.90373353/v1
Autor:
Raymond Keith Kersey, Brett M. Ziegler, Richard W. Neu, W. Steven Johnson, Morris Satin, Balkrishna S. Annigeri
Publikováno v:
Fatigue & Fracture of Engineering Materials & Structures. 43:1353-1367
Publikováno v:
MATEC Web of Conferences, Vol 165, p 19001 (2018)
Hot sections in turbine engines are subjected to large variations in temperatures and mechanical/thermal loadings. As such, accurate predictions of fatigue crack growth must account for many physical phenomena: temperature dependent crack growth beha
Autor:
Stephen D. Antolovich, Vincent M. Barker, Benjamin S. Adair, Alexander Staroselsky, W. Steven Johnson
Publikováno v:
International Journal of Fatigue. 52:95-105
An approach was developed to predict the thermo-mechanical fatigue crack growth rates under typical gas turbine engine spectrum loading conditions. The material studied in the development of this model was a polycrystalline superalloy, Inconel 100. L
Autor:
W. Steven Johnson, Carl G. Tompson
Publikováno v:
Journal of Composite Materials. 45:2259-2269
This article presents the effects of several variables on the damage progression within a mechanically fastened graphite/epoxy composite joint. The variables included the composite lay-up, loading configuration (single shear vs. double shear), R-valu
Autor:
W. Steven Johnson
Publikováno v:
Procedia Engineering. 2(1):47-58
Total fatigue life is traditionally composed of the time to crack initiation plus the time for the initiated crack to grow to a critical crack size. Fracture mechanics does reasonably well in predicting the growth portion but there is still a lot of
Autor:
Mark S. Oliver, W. Steven Johnson
Publikováno v:
Journal of Composite Materials. 43:1213-1219
The mode I critical strain energy release rates, GIC, of two polymer matrix composites were experimentally measured at temperatures ranging from -196°C to 160°C. The two composite materials investigated in this study were IM7/PETI-5 and IM7/977-2.
Autor:
W. Steven Johnson, Paul Treasurer
Publikováno v:
Journal of Composite Materials. 42:2143-2161
The goal of this research was to evaluate possible damage suppression in multi-directional notched laminates through the use of slightly off-axis longitudinal plies. These `non-traditional' laminates were compared to laminates with 0° longitudinal p
Publikováno v:
Engineering Fracture Mechanics. 75:2826-2841
The chief aim of this research is to marry elegant LEFM methods, published material data, and a commercially available FEA code together to represent complex crack growth and arrest phenomena in a thin plate with residual viscoplastic stresses. Addit
Publikováno v:
International Journal of Fatigue. 29:1319-1327
A two part study was conducted on the effects of hole drilling on the fatigue life of aircraft rivet holes in 2024-T3 aircraft quality aluminum. The first part of the study determined the drilling parameters that had the greatest effect on hole quali