Determination of material constants for crack size-dependence crack growth model

U. H. Tiong, R. Jones, L. Molent

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

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 ΔK 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 ΔK3, 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.

Original languageEnglish
Title of host publicationSelected, peer reviewed papers from The Sixth Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
Pages2189-2192
Number of pages4
EditionPART 3
Publication statusPublished - 1 Dec 2007
Event6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, Korea, Republic of (South)
Duration: 5 Nov 20079 Nov 2007

Publication series

NameMaterials Science Forum
NumberPART 3
Volume561-565
ISSN (Print)0255-5476

Conference

Conference6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6
CountryKorea, Republic of (South)
CityJeju
Period5/11/079/11/07

Keywords

  • Crack size-dependence
  • Fatigue crack growth
  • Frost-Dugdale
  • Non-similitude

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