Industry-academic Cooperation Foundation Gyeongsang National University

Yonsei University

Jin Ho Choi

Jin Hwe Kweon

Young Woo Nam

Jong Gwan Yook

Byeong Su Kwak

Joon Hyung Shin

Bo Seong Kwon

Yeong Hoon Noh

Gi Won Jeong

Various embodiments relate to an electromagnetic wave absorber having a honeycomb sandwich structure, which is capable of absorbing broadband electromagnetic waves using electromagnetic properties of a metal-coated dielectric fiber, may comprise: at least two honeycomb core layers in each of which hexagonal units formed of a material comprising the metal-coated dielectric fiber are continuously arranged; and skin layers which are disposed on top surfaces and bottom surfaces of the at least two honeycomb core layers and each include a bottom layer, a top layer, and an intermediate layer. Various other embodiments are possible.

Radar-absorbing material having honeycomb sandwich structure and stealth structure using same

A method for repairing a damaged area of a stealth composite structure having a stealth function using a scarf patch includes the steps of diagnosing the damaged area; deriving a repair area including the diagnosed damaged area; processing the scarf patch according to the derived repair area; machining a patch hole according to the derived repair area to remove the damaged area; and coupling the scarf patch to the patch hole so that an inner wall of the patch hole and a side surface of the scarf patch face.

Scarf patch repair method for stealth composite structure

The present invention relates to a fastening structure of a composite material structure, and more particularly, to a composite material stitching structure reinforced with z-direction fiber which improves strength in a lamination direction of a relatively weak composite material structure, for a composite material structure, in which composite materials are laminated and bonded.

Composite material stitching structure reinforced with Z-direction fiber

The present invention relates to a structure for fastening composite structures, and more particularly, to a sewing machine for stitching composite materials which is capable of automatically and continuously stitching the composite structures by using a high-rigidity fiber in order to laminate and join the composite materials. The sewing machine for stitching composite materials according to the present invention automatically and continuously performs a stitching operation for joining composite materials by using a high-rigidity composite fiber for joining the composite materials, and as a result, it is possible to reduce process time for joining the composite materials and improve productivity.

Growing community of inventors

Jinju-si, South Korea

Jin Ho Choi