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기술보고서

기술보고서 게시판 내용
타이틀	Elastic-Plastic Nonlinear Response of a Space Shuttle External Tank Stringer Part 1;; Stringer-Feet Imperfections and Assembly
저자	Knight, Norman F., Jr.;; Song, Kyongchan;; Elliott, Kenny B.;; Raju, Ivatury S.;; Warren, Jerry E.
Keyword	DEFECTS;; DEFLECTION;; ELASTIC PROPERTIES;; EXTERNAL TANKS;; FINITE ELEMENT METHOD;; LIQUID OXYGEN;; MECHANICAL PROPERTIES;; MODULUS OF ELASTICITY;; NONLINEARITY;; PLASTIC PROPERTIES;; ROOM TEMPERATURE;; SIMULATION;; SKIN (STRUCTURAL MEMBER); SPACE SHUTTLES;; STRAIN DISTRIBUTION;; STRINGERS;; STRUCTURAL ANALYSIS;; THERMAL EXPANSION;; THREE DIMENSIONAL MODELS
URL	http://hdl.handle.net/2060/20120008186
보고서번호	AIAA Paper 2012-1778
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Elastic-plastic, large-deflection nonlinear stress analyses are performed for the external hat-shaped stringers (or stiffeners) on the intertank portion of the Space Shuttle s external tank. These stringers are subjected to assembly strains when the stringers are initially installed on an intertank panel. Four different stringer-feet configurations including the baseline flat-feet, the heels-up, the diving-board, and the toes-up configurations are considered. The assembly procedure is analytically simulated for each of these stringer configurations. The location, size, and amplitude of the strain field associated with the stringer assembly are sensitive to the assumed geometry and assembly procedure. The von Mises stress distributions from these simulations indicate that localized plasticity will develop around the first eight fasteners for each stringer-feet configuration examined. However, only the toes-up configuration resulted in high assembly hoop strains.