NDLI: Deployment simulation methods for ultra-lightweight inflatable structures

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Deployment simulation methods for ultra-lightweight inflatable structures

Content Provider	NASA Technical Reports Server (NTRS)
Author	Johnson, Arthur R. Wang, John T.
Copyright Year	2003
Description	Two dynamic inflation simulation methods are employed for modeling the deployment of folded thin-membrane tubes. The simulations are necessary because ground tests include gravity effects and may poorly represent deployment in space. The two simulation methods are referred to as the Control Volume (CV) method and the Arbitrary Lagrangian Eulerian (ALE) method. They are available in the LS-DYNA nonlinear dynamic finite element code. Both methods are suitable for modeling the interactions between the inflation gas and the thin-membrane tube structures. The CV method only considers the pressure induced by the inflation gas in the simulation, while the ALE method models the actual flow of the inflation gas. Thus, the transient fluid properties at any location within the tube can be predicted by the ALE method. Deployment simulations of three packaged tube models; namely coiled, Z-folded, and telescopically-folded configurations, are performed. Results predicted by both methods for the telescopically-folded configuration are correlated and computational efficiency issues are discussed.
File Size	1402486
Page Count	25
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030062161
Archival Resource Key	ark:/13960/t3227vr37
Language	English
Publisher Date	2003-06-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Ground Tests Position Location Simulation Gas Flow Membrane Structures Deployment Nonlinearity Inflatable Structures Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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