Zobrazeno 1 - 10
of 15
pro vyhledávání: '"J Keith Donald"'
Publikováno v:
International Journal of Fatigue. 47:58-70
It is well established that there are two fatigue crack tip driving forces – the cyclic, Δ K , and the static, K max . In this study, the effects of each crack tip driving force on crack growth were evaluated for various structural materials. A un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::738d9b1923aa7f77bfbe0acf19e37b2f
https://doi.org/10.1016/j.ijfatigue.2012.07.009
https://doi.org/10.1016/j.ijfatigue.2012.07.009
Autor:
Richard L. Brazill, J. Keith Donald
Publikováno v:
Materials Performance and Characterization. 7:20170118
When compliance methods are used to determine specimen crack size in fracture mechanics testing, accurate and unbiased determination of the slope of the linear region of the force versus the crack opening displacement (COD) curve is required. Often,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3775d003a30b88553cd0f81f07e1762
https://doi.org/10.1520/mpc20170118
https://doi.org/10.1520/mpc20170118
Publikováno v:
Materials Performance and Characterization. 7:20170094
It is well recognized that crack size or load history or both have an important influence on near-threshold fatigue crack rate behavior at a low stress ratio. This investigation will compare the behavior of a radial crack, such as a surface flaw or a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3455adfea1da870751bfa5381e1579d
https://doi.org/10.1520/mpc20170094
https://doi.org/10.1520/mpc20170094
Publikováno v:
International Journal of Fatigue. 29:687-694
A new methodology is proposed to determine (1) stress intensity factors due to residual stress, Kres, when samples with high residual stress are tested, and (2) effective stress intensity factors, Keff, from corresponding applied stresses when closur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4f15f61af97b41bd1050b7e11f89da1
https://doi.org/10.1016/j.ijfatigue.2006.07.002
https://doi.org/10.1016/j.ijfatigue.2006.07.002
Autor:
J. Keith Donald, Diana A. Lados
Publikováno v:
Fatigue & Fracture of Engineering Materials and Structures. 30:223-230
To properly interpret the results of standard fatigue crack growth tests it is often necessary to incorporate corrective techniques to the ΔK applied data. This is especially true in the near-threshold regime where long crack data need to be closure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d256e59132a56d44bcf2d3a68c07b40
https://doi.org/10.1111/j.1460-2695.2006.01081.x
https://doi.org/10.1111/j.1460-2695.2006.01081.x
Publikováno v:
Acta Materialia. 54:1475-1486
The near-threshold crack growth behavior (Δ K th /Region I) of hypoeutectic and eutectic Al–Si–Mg cast alloys was investigated for both long and short cracks. To isolate and establish the mechanistic contributions of microstructural features (de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::786ca14d612d238a2cd0d29a093570e4
https://doi.org/10.1016/j.actamat.2005.11.019
https://doi.org/10.1016/j.actamat.2005.11.019
Publikováno v:
International Journal of Fatigue. 27:1463-1472
Crack growth behavior of small and long cracks has been a subject of much research; the differences observed in the growth response were largely attributed to crack closure. In this study, cast Al–Si–Mg alloys of various residual stress levels an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a96aeeabb603fe8aa70e8e058c59a230
https://doi.org/10.1016/j.ijfatigue.2005.06.013
https://doi.org/10.1016/j.ijfatigue.2005.06.013
Autor:
J. Keith Donald
Publikováno v:
International Journal of Fatigue. 19:191-195
Local crack tip strain measurements show that the conventional determination of ΔK effective may be misleading, especially when opening loads are relatively high as is often the case in the near-threshold regime. The conventional method assumes that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b2b7e2a58e8b44e5394f6799fc1ea26
https://doi.org/10.1016/s0142-1123(97)00024-8
https://doi.org/10.1016/s0142-1123(97)00024-8
Publikováno v:
Materials Performance and Characterization. 2:20120042
In fracture toughness testing on beryllium and aluminum-beryllium materials, the load-displacement response exhibits a significant amount of nonlinearity that requires special, nontraditional methods for analysis. This work is directed toward determi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec0b97c893c2f05cf006b2f454134102
https://doi.org/10.1520/mpc20120042
https://doi.org/10.1520/mpc20120042