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http://dx.doi.org/10.7234/composres.2013.26.2.085

Experimental Testing of Curved Aluminum Honeycomb/CFRP Sandwich Panels  

Roy, Rene (Department of Aerospace and System Engineering, Research Center for Aircraft Parts Technology, Gyeongsang National University)
Park, Yong-Bin (Department of Aerospace and System Engineering, Research Center for Aircraft Parts Technology, Gyeongsang National University)
Kweon, Jin-Hwe (Department of Aerospace and System Engineering, Gyeongsang National University)
Choi, Jin-Ho (School of Mechanical Engineering, Gyeongsang National University)
Publication Information
Composites Research / v.26, no.2, 2013 , pp. 85-90 More about this Journal
Abstract
This paper presents the fabrication and 3-point flexion testing of carbon fiber reinforced polymer (CFRP) composite face/aluminum honeycomb core sandwich panels. Specimen sandwich panels were fabricated with three honeycomb types (3.18 mm, 4.76 mm, and 6.35 mm cell size) and three panel radii (flat, r = 1.6 m, r = 1.3 m). The curved sandwiches were fabricated normally with the core in the W-direction. The tensile mechanical properties of the CFRP $2{\times}2$ twill fabric face laminate were evaluated (modulus, strength, Poisson's ratio). The measured values are comparable to other CFRP fabric laminates. The flat sandwich 3-point flexion test core shear strength results were 11-30% lower than the manufacturer published data; the test set-up used may be the cause. With a limited sample size, the 1.3 meter panel curvature appeared to cause a 0.8-3.8% reduction in ultimate core shear strength compared to a flat panel.
Keywords
sandwich; honeycomb; carbon fiber reinforced polymer; curvature; flexion;
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