NDLI: Probabilistic sizing of laminates with uncertainties

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Probabilistic sizing of laminates with uncertainties

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shah, A. R. Liaw, D. G. Chamis, C. C.
Copyright Year	1993
Description	A reliability based design methodology for laminate sizing and configuration for a special case of composite structures is described. The methodology combines probabilistic composite mechanics with probabilistic structural analysis. The uncertainties of constituent materials (fiber and matrix) to predict macroscopic behavior are simulated using probabilistic theory. Uncertainties in the degradation of composite material properties are included in this design methodology. A multi-factor interaction equation is used to evaluate load and environment dependent degradation of the composite material properties at the micromechanics level. The methodology is integrated into a computer code IPACS (Integrated Probabilistic Assessment of Composite Structures). Versatility of this design approach is demonstrated by performing a multi-level probabilistic analysis to size the laminates for design structural reliability of random type structures. The results show that laminate configurations can be selected to improve the structural reliability from three failures in 1000, to no failures in one million. Results also show that the laminates with the highest reliability are the least sensitive to the loading conditions.
File Size	757449
Page Count	22
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930017893
Archival Resource Key	ark:/13960/t2g789g04
Language	English
Publisher Date	1993-05-01
Access Restriction	Open
Subject Keyword	Composite Materials Micromechanics Sensitivity Failure Analysis Structural Reliability Reliability Analysis Laminates Composite Structures Probability Density Functions Computer Programs Loads Forces Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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