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http://dx.doi.org/10.7234/composres.2014.27.2.077

A Study on 4 Point Bending Strength of Carbon/epoxy Face Sheet and Honeycomb Core Sandwich Composite Structure after Open Hole Damage  

Park, Hyunbum (호원대학교 국방기술학부 항공정비기술학전공)
Publication Information
Composites Research / v.27, no.2, 2014 , pp. 77-81 More about this Journal
Abstract
In this study, it was performed damage assessment and repair of small scale aircraft adopted on composite. This aircraft adopted the sandwich structure to skin of wing. This study aims to investigate the residual strength of sandwich composites with nomex honeycomb core and carbon fiber face sheets after the open hole damage by the experimental investigation. The 4-point bending tests were used to find the bending strength, and the open hole was applied to introduce the simulated damage on the specimen. The bending strength test results after open hole were compared with the results of no damaged specimen test. In addition, The damaged composite structure was repaired using external patch repair method after removing damaged area. After that, this study presents comparison results of the experimental investigation between the damaged and the repaired specimen. It was found that the bending strength of repaired specimen was recovered up to 95% of undamaged specimen.
Keywords
sandwich composite structure; open hole damage; repair; bending test; residual strength;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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