NDLI: Assuring life in composite systems

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Assuring life in composite systems

Content Provider	NASA Technical Reports Server (NTRS)
Author	Chamis, Christos c.
Copyright Year	2008
Description	A computational simulation method is presented to assure life in composite systems by using dynamic buckling of smart composite shells as an example. The combined use of composite mechanics, finite element computer codes, and probabilistic analysis enable the effective assessment of the dynamic buckling load of smart composite shells. A universal plot is generated to estimate the dynamic buckling load of composite shells at various load rates and probabilities. The shell structure is also evaluated with smart fibers embedded in the plies right below the outer plies. The results show that, on the average, the use of smart fibers improved the shell buckling resistance by about 9% at different probabilities and delayed the buckling occurrence time. The probabilistic sensitivities results indicate that uncertainties in the fiber volume ratio and ply thickness have major effects on the buckling load. The uncertainties in the electric field strength and smart material volume fraction have moderate effects and thereby in the assured life of the shell.
File Size	1051037
Page Count	21
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090004421
Archival Resource Key	ark:/13960/t7jq5z83f
Language	English
Publisher Date	2008-11-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Composite Materials Probability Theory Embedding Shells Structural Forms Dynamic Loads Systems Simulation Composite Structures Buckling Smart Materials Loads Forces 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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