Journal ArticleDOI
VABS: A new concept for composite rotor blade cross-sectional modeling
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This article is published in Journal of The American Helicopter Society.The article was published on 1997-01-01. It has received 429 citations till now. The article focuses on the topics: Rotor (electric).read more
Citations
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On Timoshenko-like modeling of initially curved and twisted composite beams
TL;DR: In this paper, a generalized finite-element-based, cross-sectional analysis for nonhomogenous, initially curved and twisted, anistropic beams is formulated from geometrically nonlinear, three-dimensional elasticity.
Journal ArticleDOI
Validation of the Variational Asymptotic Beam Sectional Analysis
TL;DR: The VABS (Variational Asymptotic Beam Section Analysis) algorithm as mentioned in this paper uses the variational asymptotics to split a three-dimensional nonlinear elasticity problem into a two-dimensional linear cross-sectional analysis and a one-dimensional, nonlinear beam problem.
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Applications of the unsteady vortex-lattice method in aircraft aeroelasticity and flight dynamics
TL;DR: The Unsteady Vortex-Lattice Method (UVM) as mentioned in this paper provides a medium-fidelity tool for the prediction of non-stationary aerodynamic loads in low-speed, but high-Reynolds-number, attached flow conditions.
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Variational asymptotic beam sectional analysis – An updated version
TL;DR: In this paper, three recent updates to the variational asymptotic beam sectional analysis (VABS) have been discussed, including a change to the warping constraints in terms of three-dimensional variables, so that one-dimensional beam variables are treated with more rigor.
Journal ArticleDOI
Modeling rotorcraft dynamics with finite element multibody procedures
TL;DR: A multibody dynamics approach to the modeling of rotorcraft systems and the algorithms used to integrate the resulting equations of motion with maximum efficiency and robustness are discussed.
References
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Journal ArticleDOI
An iteration method for the solution of the eigenvalue problem of linear differential and integral operators
TL;DR: In this article, a systematic method for finding the latent roots and principal axes of a matrix, without reducing the order of the matrix, has been proposed, which is characterized by a wide field of applicability and great accuracy, since the accumulation of rounding errors is avoided, through the process of minimized iterations.
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A mixed variational formulation based on exact intrinsic equations for dynamics of moving beams
TL;DR: In this paper, a nonlinear intrinsic formulation for the dynamics of initially curved and twisted beams in a moving frame is presented, which is written in a compact matrix form without any approximations to the geometry of the deformed beam reference line or to the orientation of the intrinsic cross-section frame.
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Anisotropic beam theory and applications
Vittorio Giavotto,Marco Borri,Paolo Mantegazza,Gian Luca Ghiringhelli,V. Carmaschi,G. C. Maffioli,F. Mussi +6 more
TL;DR: In this paper, the stiffness and the stresses of a beam section made of anisotropic and non-homogeneous materials such as the rotor blades of a modern helicopter or of a large wind generator are calculated.
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Formulation and evaluation of an analytical model for composite box-beams
Edward C. Smith,Inderjit Chopra +1 more
TL;DR: In this article, a direct method for determining the effective elastic stiffnesses and deformation behavior of composite box-beam (BB) structures is developed analytically, validated, and demonstrated.
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Thin-walled composite beams under bending, torsional, and extensional loads
TL;DR: In this paper, symmetric and antisymmetric layup graphite-epoxy composite beams with thin-walled rectangular cross sections are fabricated using an autoclave molding technique and tested under bending, torsional, and extensional loads.