Results 21 to 30 of about 2,874,418 (289)

Ordering of Rods near Surfaces: Concentration Effects

open access: yesCrystals, 2019
We study the orientation of rods in the neighborhood of a surface. A semi-infinite region in two different situations is considered: (i) the rods are located close to a flat wall and (ii) the rods occupy the space that surrounds a sphere.
Dora Izzo
doaj   +1 more source

Perverted Space-Time Geodesy in Einstein’s Views on Geometry

open access: yesPhilosophia Scientiæ, 2018
A perverted space-time geodesy results from the idea of variable rods and clocks, whose length and rates are taken to be affected by the gravitational field.
Mario Bacelar Valente
doaj   +1 more source

Lattice shells composed of two families of curved Kirchhoff rods: an archetypal example, topology optimization of a cycloidal metamaterial

open access: yesContinuum Mechanics and Thermodynamics, 2020
A nonlinear elastic model for nets made up of two families of curved fibers is proposed. The net is planar prior to the deformation, but the equilibrium configuration that minimizes the total potential energy can be a surface in the three-dimensional ...
I. Giorgio
semanticscholar   +1 more source

A general asymptotic dynamic model for Lipschitzian elastic curved rods

open access: yesJournal of Applied Mathematics, 2005
We study the asymptotic behaviour of solutions to the linear evolution problem for clamped curved rods with the small thickness ε under minimal regularity assumptions on the geometry. In addition, nonconstant density of the curved rods is considered.
Rostislav Vodák
doaj   +1 more source

STABILITY CALCULATION OF ROD ELEMENTS OF SOLID-WALL ARCHES BY THE FLEXURAL-TORSIONAL FORM

open access: yesArchitecture and Engineering, 2017
The work considers main, most significant scientific works on study of the stability of rods with the curved axis; the issue of the subject matter investigation is examined. A procedure for determining the spatial displacements of curvilinear rods during
Dmitrii Urazgildeev, Grigorii Beliy
doaj   +1 more source

New refined model for curved linear anisotropic rods with circular cross section

open access: yesApplications in Engineering Science, 2021
An asymptotic reduction method is introduced to construct a curved rod theory for a general anisotropic linearized elastic material. For the sake of simplicity, the cross section is assumed to be circular.
Erick Pruchnicki   +2 more
doaj   +1 more source

Nonlinear Weakly Curved Rod by Γ-Convergence [PDF]

open access: yesJournal of Elasticity, 2011
We present a nonlinear model of weakly curved rod, namely the type of curved rod where the curvature is of the order of the diameter of the cross-section. We use the approach analogous to the one for rods and curved rods and start from the strain energy functional of three dimensional nonlinear elasticity and do not presuppose any constitutional ...
openaire   +3 more sources

A Unified Approach for Out-of-Plane Forced Vibration of Axially Functionally Graded Circular Rods

open access: yesEuropean Mechanical Science, 2018
Out-of-plane forced vibration of axially inhomogeneous curved rods is examined by the Complementary Functions Method (CFM) in the Laplace domain. The material properties, Young’s modulus and density, of the circular rods are graded in the axial direction
Timuçin Alp Aslan   +2 more
doaj   +1 more source

Lectures on Elastic Curves and Rods [PDF]

open access: yesAIP Conference Proceedings, 2008
These five lectures constitute a tutorial on the Euler elastica and the Kirchhoff elastic rod. We consider the classical variational problem in Euclidean space and its generalization to Riemannian manifolds. We describe both the Lagrangian and the Hamiltonian formulation of the rod, with the goal of examining the (Liouville‐Arnol'd) integrability.
David A. Singer   +3 more
openaire   +1 more source

New taxa of the weevils of the tribe Blosyrini (Coleoptera: Curculionidae: Entiminae) from the Sino-Tibetan Mountains [PDF]

open access: yesКавказский энтомологический бюллетень, 2022
A new weevil genus Igorius Davidian, gen. n. (Entiminae: Blosyrini) is described from the south-western part of Sichuan Province in China. It is characterized in the following features: rostrum subquadrate; pronotum widest between of the middle and ...
G.E. Davidian
doaj   +1 more source

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