국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Design, Optimization, and Evaluation of Integrally-Stiffened Al-2139 Panel with Curved Stiffeners
저자	Havens, David;; Shiyekar, Sandeep;; Norris, Ashley;; Bird, R. Keith;; Kapania, Rakesh K.;; Olliffe, Robert
Keyword	CURVATURE;; DESIGN OPTIMIZATION;; FINITE ELEMENT METHOD;; LOAD TESTS;; LOADS (FORCES); MASS DISTRIBUTION;; NONLINEARITY;; PANELS;; PYLONS;; RIBS (SUPPORTS); SHEAR STRESS;; STIFFENING;; STRAIN GAGES;; TOLERANCES (MECHANICS); TRANSDUCERS
URL	http://hdl.handle.net/2060/20110023249
보고서번호	NASA/TM-2011-217308
발행년도	2011
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A curvilinear stiffened panel was designed, manufactured, and tested in the Combined Load Test Fixture at NASA Langley Research Center. The panel is representative of a large wing engine pylon rib and was optimized for minimum mass subjected to three combined load cases. The optimization included constraints on web buckling, material yielding, crippling or local stiffener failure, and damage tolerance using a new analysis tool named EBF3PanelOpt. Testing was performed for the critical combined compression-shear loading configuration. The panel was loaded beyond initial buckling, and strains and out-of-plane displacements were extracted from a total of 20 strain gages and 6 linear variable displacement transducers. The VIC-3D system was utilized to obtain full field displacements/strains in the stiffened side of the panel. The experimental data were compared with the strains and out-of-plane deflections from a high fidelity nonlinear finite element analysis. The experimental data were also compared with linear elastic finite element results of the panel/test-fixture assembly. Overall, the panel buckled very near to the predicted load in the web regions.