Fatigue Crack Propagation Behavior and Damage Accumulation Relationships in an Aluminum Alloy / BPD O'Connor, A. Plumtree

Conference Author:: Fracture Mechanics: Nineteenth Symposium (19th : 1986 : San Antonio, TX)
Physical Description:: 1 online resource (13 pages) : illustrations, figures, tables
Additional Creators:: O'Connor, BPD, Plumtree, A., American Society for Testing and Materials, and ASTM International

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Summary:

Damage accumulation was studied in strain-cycled aluminum Alloy 6066-T6 cylindrical fatigue specimens. The damage was assessed by measuring the ratio of cracked to cross-sectioned areas and monitoring the apparent modulus changes after different life fractions. Both these methods were found to correlate well. Stage II fatigue crack propagation was established when the surface crack length had attained a critical value of approximately 700 ?m. A linear relationship with crack depth ensued. Below this value, the crack depth was small by comparison and damage levels were below 1%. Over 60% of the fatigue life was spent in Stage I (or surface-dominated) crack growth where the cracked area was insignificant. From a practical point of view, damage was considered to begin after this life fraction and a damage mechanics model was successfully applied to the experimental results.

Dates of Publication and/or Sequential Designation:

Volume 1988, Issue 969 (January 1988)

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ISBN:

9780803150416 (e-ISBN)
9780803109728
0803109725

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text file PDF

Bibliography Note:

Includes bibliographical references 12.

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Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1988. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.

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Mode of access: World Wide Web.

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ASTM International PDF Purchase price USD25.

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