Paper Title:
Determination of Material Constants for Crack Size-Dependence Crack Growth Model
  Abstract

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
DOI
10.4028/www.scientific.net/MSF.561-565.2189
Citation
U.H. Tiong, R. Jones, L. Molent, "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
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Price
$32.00
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