Static Environmental Testing of a Cocured Aircraft Wing Test Box

Kamath, GM and Ramanaiah, B and Verma, KK and Subba Rao, M (2007) Static Environmental Testing of a Cocured Aircraft Wing Test Box. In: 15th National Conference on Aerospace Structures, 15-16 Oct 2007, Coimbatore, Tamil Nadu, India.

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Existing primary aircraft structures are typically fabricated by fastening the skins to the internal substructure. However, there are several advantages for opting for a cocured route of fabrication wherein, instead of fastening, the skin and the substructure are cured together. Keeping in view the advantages, an attempt has been made at NAL to develop the fabrication technology for a cocured wing test box that is of the same scale and designed for the same loads as the rear root fitting box of a combat aircraft. After completing the static tests for the ultimate load, the box was placed in an environmental chamber for more than a year and exposed to temperature and moisture. The conditioning of the test box was done along with different specimens and features, which apart from indirectly indicating the moisture content in the box, also provided some interesting insights into the mechanism of moisture absorption. After ensuring saturation of moisture, the hot-wet testing of the box was carried out. The tests were done with the box enclosed in a special in-situ environmental chamber. The comparison between the results for the room temperature test results and the hot-wet test results are presented here and discussed. The results indicate that it is feasible to design and fabricate wing structures using co-curing technology.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Composites;Cocuring technology;Wing test box;Environmental testing
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Ms. Alphones Mary
Date Deposited: 16 Nov 2010 04:05
Last Modified: 16 Nov 2010 04:05

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