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A Study on the fatigue Behavior of Aluminum Repaired by Graphite/Epoxy Composite - Pretreatment Effect of Aluminum  

김만태 (경희대학교 대학원)
이경엽 (경희대학교 테크노공학대학)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.11, 2004 , pp. 149-154 More about this Journal
Abstract
For a present study, we investigated fatigue behavior of cracked aluminum repaired by unidirectional graphite/epoxy composite material. Three different specimens were used in the fatigue tests: cracked aluminum, cracked aluminum repaired by graphite/epoxy composite patch, and plasma-treated aluminum repaired by graphite/epoxy composite patch. The surface of the aluminum was treated using a DC plasma. The results showed that the fatigue crack growth behavior of cracked aluminum was significantly improved by repairing the cracked area with a composite patch. Specifically, the specimen repaired by composite patch showed about 300％ more fatigue lift than the cracked aluminum. In particular, the plasma-treated aluminum repaired by composite patch showed almost 12 ％ more fatigue life than the cracked aluminum repaired by graphite/epoxy composite patch. The increased fatigue life of plasma-treated case was attributed to the surface roughness of aluminum by plasma treatment.
Keywords
Stress Intensity Factor; Graphite/epoxy Composite; Plasma Treatment; Fatigue Life;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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