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http://dx.doi.org/10.7234/composres.2017.30.6.384

Design and Verification of a Novel Composite Sandwich Joint Structure  

Kwak, Byeong-Su (School of Mechanical and Aerospace and Engineering, Gyeongsang National University)
Ju, Hyun-woo (School of Mechanical and Aerospace and Engineering, Gyeongsang National University)
Kim, Hong-Il (Agency for Defense Development)
Dong, Seung-Jin (Hankuk Fiber Co., Ltd. Defence and Aerospace Division)
Kweon, Jin-Hwe (School of Mechanical and Aerospace and Engineering, Gyeongsang National University)
Publication Information
Composites Research / v.30, no.6, 2017 , pp. 384-392 More about this Journal
Abstract
Sandwich panels with three different joint configurations were tested to design a novel sandwich joint structure that can effectively support both the tensile and compressive loads. The sandwich core was mainly aluminum flex honeycomb but the PMI foam core was limitedly applied to the ramp area which is transition part from sandwich to solid laminate. The face of sandwich panel was made of carbon fiber composite. For configuration 1, the composite flange and the sandwich panel were cocured. For configurations 2 and 3, an aluminum flange was fastened to the solid laminate by HI-LOK pins and adhesive. The average compressive failure loads of configurations 1, 2, and 3 were 295, 226, and 291 kN, respectively, and the average tensile failure loads were 47.3 (delamination), 83.7 (bolt failure), and 291 (fixture damage) kN, respectively. Considering the compressive failure loads only, both the configurations 1 and 3 showed good performance. However, the configuration 1 showed delamination in the corner of the composite flange under tension at early stage of loading. Therefore, it was confirmed that the structure that can effectively support tension and compressive loads at the same time is the configuration 3 which used a mechanically fastened aluminum flange so that there is no risk of delamination at the corner.
Keywords
Composite material; Sandwich; Joint; Failure;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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