국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Design of Fiber Reinforced Foam Sandwich Panels for Large Ares V Structural Applications
저자	Bednarcyk, Brett A.;; Arnold, Steven M.;; Hopkins, Dale A.
Keyword	ARES 5 CARGO LAUNCH VEHICLE;; BEAMS (SUPPORTS); BUCKLING;; FIBER COMPOSITES;; FINITE ELEMENT METHOD;; FOAMS;; MECHANICAL PROPERTIES;; NASTRAN;; PANELS;; PAYLOADS;; SANDWICH STRUCTURES;; SHROUDS;; STRUCTURAL DESIGN
URL	http://hdl.handle.net/2060/20100040417
보고서번호	NASA/TM-2010-216823
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	The preliminary design of three major structural components within NASA''s Ares V heavy lift vehicle using a novel fiber reinforced foam composite sandwich panel concept is presented. The Ares V payload shroud, interstage, and core intertank are designed for minimum mass using this panel concept, which consists of integral composite webs separated by structural foam between two composite facesheets. The HyperSizer structural sizing software, in conjunction with NASTRAN finite element analyses, is used. However, since HyperSizer does not currently include a panel concept for fiber reinforced foam, the sizing was performed using two separate approaches. In the first, the panel core is treated as an effective (homogenized) material, whose properties are provided by the vendor. In the second approach, the panel is treated as a blade stiffened sandwich panel, with the mass of the foam added after completion of the panel sizing. Details of the sizing for each of the three Ares V components are given, and it is demonstrated that the two panel sizing approaches are in reasonable agreement for thinner panel designs, but as the panel thickness increases, the blade stiffened sandwich panel approach yields heavier panel designs. This is due to the effects of local buckling, which are not considered in the effective core property approach.