Št. zadetkov: 43
Izvirni znanstveni članek
Oznake:
gradbeništvo;nelinearne teorije;gradbena dinamika;numerične analize;končni elementi;gradiva;non-linear beam theory;non-linear material;reiforced concrete;stress field integration;Newton's iteration;rate of convergence;
The way the non-linear constitutive equations in the spatial beam formulations are solved, influences the rate of convergence and the computational cost. Three different approaches are studied: (i) the direct global approach, where the constitutive equations are taken to be the iterative part of the ...
Leto:
2008
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
linearna teorija nosilcev;ukrivljeni nosilci;zviti nosilci;konsistentna linearizacija;deformacijske količine;prostorski nosilci;prostorske rotacije;linear beam theory;naturally curved beam;twisted beam;consistent linearization;strain measure;three-dimensional beam;three-dimensional rotation;
This paper presents the equations of the linearized geometrically exact three-dimensional beam theory of naturally curved and twisted beams. A new finite-element formulation for the linearized theory is proposed in which the strain vectors are the only unknown functions. The linear form of the consi ...
Leto:
2006
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
armirani beton;prerezi;dvoosni upogib;analitična integracija;analytical integration;biaxial bending;reinforced concrete section;
This paper presents a novel stress field and tangent material moduli integration procedure over a cross-section of a biaxially loaded concrete beam. The procedure assumes a sufficiently simple analytical form of the constitutive law of concrete, the polygonal shape of the boundary of the simply- or ...
Leto:
2005
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
nelinearna teorija nosilcev;metoda končnih elementov;prostorske rotacije;non-linear beam theory;finite element method;three-dimensional rotation;
This paper introduces a new finite element formulation of the `geometrically exact finite-strain beam theory'. The formulation employs the generalized virtual work principle. In the resulting governing equations of the beam, the strain vectors are the only unknown functions. The consistency conditio ...
Leto:
2004
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
prostorski nosilci;metoda končnih elementov;standardni test elementa;three-dimensional beams;finite element method;standard test problem;
The standard test problem of MacNeal and Harder (Finite Elem. Anal. Des. 1 (1985) 3) for the verification of spatial beam finite elements, i.e. the deflection of the initially twisted beam, is commented through the analysis of three variants of initially twisted beams: (i) a linearly twisted beam wi ...
Leto:
2004
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
prostorski nosilci;rotacije;ukrivljenost;metoda končnih elementov;three-dimensional beams;three-dimensional rotations;curvature;finite element method;
article introduces a new finite element formulation of the three-dimensional `geometrically exact finite-strain beam theory'. The formulation employs the generalized virtual work principle with the pseudo-curvature vector as the only unknown function. The solution of the governing equations is obtai ...
Leto:
2003
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
prostorski nosilci;rotacije;ukrivljenost;metoda končnih elementov;3D beam;rotations;curvature;finite element method;
A new finite element formulation of the *kinematically exact finite-strain beam theory* is presented. The finite element formulation employs the generalized virtual work in which the main role is played by the pseudo-curvature vector. The solution of the governing equations is found by using a combi ...
Leto:
2003
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
prostorski nosilci;točna teorija;nelinearnost;deformacije;metoda končnih elementov;non-linear beam theory;finite-element method;three-dimensional rotation;rotational invariant;strain measure;
This paper presents a new finite element formulation of the `geometrically exact finite-strain beam theory'. The governing equations of the beam element are derived in which the strain vectors are the only unknown functions. The consistency condition that the equilibrium and the constitutive interna ...
Leto:
2003
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
Euler's disk;rolling;sliding;numerical solution;rattling sound;
The motion of a disk spinning on a horizontal surface has drawn a great deal of interest recently. The objectives of the researches are to find out what produces an increasing rattling sound and why the spinning ends so abruptly. In order to understand the behaviour of the spinning disk better, we d ...
Leto:
2006
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)
Izvirni znanstveni članek
Oznake:
rotacije;kotna hitrost;integracije po času;kvaternioni;metoda Runge-Kutta;metoda midpoint;rotation;angular velocity;time integrations;quaternions;Runge-Kutta method;midpoint rule;
Abstract
The integration of the rotation from a given angular velocity is often required in practice. The present paper explores how the choice of the parametrization of rotation, when employed in conjuction with different numerical time-integration schemes, effects the accuracy and the computation ...
Leto:
2011
Vir:
Fakulteta za gradbeništvo in geodezijo (UL FGG)