Determination of Material Constants for Crack Size-Dependence Crack Growth Model

Abstract:

Article Preview

A crack size-dependence crack growth model was used to characterise the fatigue crack growth in AL 7075-T6 and AL 2024-T351 alloys. It is shown that the crack growth parameters %K and a can be used to linearise the crack growth in regions I (elastic) and II (plastic) by plotting fatigue data linear-linear da/dN×√a versus %K3, where cubic stress dependency is assumed. A theoretical attempt was made to relate this crack size-dependence fatigue crack growth parameters to the strain-life relationship constants. A reasonably good agreement was achieved when comparing between the theoretical predicted and experimental determined material constants.

Info:

Periodical:

Materials Science Forum (Volumes 561-565)

Main Theme:

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

2189-2192

Citation:

U.H. Tiong et al., "Determination of Material Constants for Crack Size-Dependence Crack Growth Model", Materials Science Forum, Vols. 561-565, pp. 2189-2192, 2007

Online since:

October 2007

Export:

Price:

$38.00

[1] S. Barter, L. Molent, N. Goldsmith, and R. Jones, An experimental evaluation of fatigue crack growth, Engng Failure Analysis, vol. 12, pp.99-128, (2004).

DOI: https://doi.org/10.1016/j.engfailanal.2004.04.002

[2] N. E. Frost and D. S. Dugdale, The propagation of fatigue cracks in sheet specimens, J. Mech. Phys. Solids, (1957).

[3] G. Glinka, A cumulative model of fatigue crack growth, Int. J. Fatigue, pp.59-67, (1982).

[4] S. S. Manson and M. H. Hirschberg, Fatigue: an interdisciplinary approach, in Syracuse University Press. Syracuse, 1964, p.133.

[5] L. F. Coffin and J. F. Tavernelli, The cyclic straining and fatigue of metals, Trans Metall Soc A I M E, vol. 215, p.794, (1959).

[6] D. T. Raske and J. D. Morrow, Manual on low cycle fatigue testing, American Society for Testing and Materials, vol. STP 465, pp.1-26, (1969).

DOI: https://doi.org/10.1520/stp33316s

[7] ASTM Standard, E606-77T, in In Annual Book of ASTM Standards, Part 10: American Society for Testing and Materials, 1977, pp.614-631.

[8] K. Molski and G. Glinka, A method of elastic-plastic stress and strain calculation at a notch root, Materials Science and Engineering, vol. 50, pp.93-100, (1981).

DOI: https://doi.org/10.1016/0025-5416(81)90089-6

[9] S. C. Forth, C. W. Wright, and J. W. M. Johnston, 7075-T6 and 2024-T351 aluminum alloy fatigue crack growth rate data, NASA Langley Research Center, Hampton, Virginia, USA NASA/TM-2005-213907, 2005. (a) (b).

Fetching data from Crossref.
This may take some time to load.