NDLI: Nonlinear probabilistic finite element models of laminated composite shells

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Nonlinear probabilistic finite element models of laminated composite shells

Content Provider	NASA Technical Reports Server (NTRS)
Author	Reddy, J. N. Engelstad, S. P.
Copyright Year	1993
Description	A probabilistic finite element analysis procedure for laminated composite shells has been developed. A total Lagrangian finite element formulation, employing a degenerated 3-D laminated composite shell with the full Green-Lagrange strains and first-order shear deformable kinematics, forms the modeling foundation. The first-order second-moment technique for probabilistic finite element analysis of random fields is employed and results are presented in the form of mean and variance of the structural response. The effects of material nonlinearity are included through the use of a rate-independent anisotropic plasticity formulation with the macroscopic point of view. Both ply-level and micromechanics-level random variables can be selected, the latter by means of the Aboudi micromechanics model. A number of sample problems are solved to verify the accuracy of the procedures developed and to quantify the variability of certain material type/structure combinations. Experimental data is compared in many cases, and the Monte Carlo simulation method is used to check the probabilistic results. In general, the procedure is quite effective in modeling the mean and variance response of the linear and nonlinear behavior of laminated composite shells.
File Size	57928332
Page Count	204
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930011730
Archival Resource Key	ark:/13960/t0wq4wg52
Language	English
Publisher Date	1993-02-01
Access Restriction	Open
Subject Keyword	Composite Materials Micromechanics Finite Element Method Deformation Anisotropy Kinematics Fiber Composites Plastic Properties Shells Structural Forms Laminates Three Dimensional Composites Monte Carlo Method Nonlinear Systems 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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