국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Mechanical Characterization of In and Out-of-Autoclave Cured Composite Panels for Large Launch Vehicles
저자	Kellas, Sotiris;; Lerch, Bradley A.;; Wilmoth, Nathan
Keyword	AUTOCLAVES;; AXIAL STRAIN;; BUCKLING;; CHARACTERIZATION;; COMPOSITE STRUCTURES;; CROSS SECTIONS;; FABRICATION;; LARGE SPACE STRUCTURES;; LAUNCH VEHICLES;; MECHANICAL PROPERTIES;; NONDESTRUCTIVE TESTS;; PANELS;; PHOTOMICROGRAPHY;; PREPREGS;; SANDWICH STRUCTURES;; SPLICING;; STRAIN GAGES
URL	http://hdl.handle.net/2060/20120009342
보고서번호	NF1676L-13458
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Two manufacturing demonstration panels Ƒ/16th-arc-segments of 10 m diameter cylinder) were fabricated under the composites part of the Lightweight Space Structures and Materials program. Both panels were of sandwich construction with aluminum core and 8-ply quasi-isotropic graphite/epoxy facesheets. One of the panels was constructed with in-autoclave curable unidirectional prepreg (IM7/977-3) and the second with out-of-autoclave unidirectional prepreg (T40-800B/5320-1). Following NDE inspection, each panel was divided into a number of small specimens for material property characterization and a large Ɛ.914 m wide by 1.524 m long) panel for a buckling study. Results from the small specimen tests were used to (a) assess the fabrication quality of each 1/16th arc segment panel and (b) to develop and/or verify basic material property inputs to Finite Element analysis models. The mechanical performance of the two material systems is assessed at the coupon level by comparing average measured properties such as flatwise tension, edgewise compression, and facesheet tension. The buckling response of the 0.914 m wide by 1.524 m long panel provided a comparison between the in- and out-of autoclave systems at a larger scale.