Keresés

Keresési eredmények

• On the Torsional Rigidity of Orthotropic Beams with Rectangular Cross Section

  25-30

  Baksa Attila

  Ecsedi István

  Lengyel Ákos József

  Gönczi Dávid

  Megtekintések száma:

  97

  The paper deals with the torsional rigidity of homogenous and orthotropic beam with rectangular cross
  section. The torsional rigidity of the considered beam is defined in the framework of the Saint-Venant theory of
  uniform torsion. Exact and approximate solutions are given to the determination of the torsional rigidity. The shape
  of cross section is determined which gives maximum value of the torsional rigidity for a given cross-sectional area.
  The dependence of torsional rigidity as a function of the ratio shear moduli of beam is also studied.

• The Influence of the Boundary Conditions on the Buckling of Thin-walled Cans during Manufacturing

  41-50

  Gönczi Dávid

  Megtekintések száma:

  93

  In this paper the effect of the boundary conditions on the stability of thin-walled aerosol cans under axial pressure is investigated. The main objective is to outline the main characteristics of this highly nonlinear mechanical problem and to present methods to simulate the buckling of cans with different boundary conditions. Due to the numerical difficulties coming from the contact between the can and different components of the machines, the effect of the different supports of the can is investigated on the crushing (or buckling) force at which the loss of stability occurs. The commercial finite element software Abaqus is used to solve the problems and to present the efficiency of FE codes in the design process of cans.

• Üreges csonka gömb alakú rugalmas test csavarása

  234-240

  Ecsedi István

  Lengyel Ákos

  Baksa Attila

  Gönczi Dávid

  Megtekintések száma:

  138

  Jelen kutatás tárgya olyan forgástestek csavarási problémája, melyek alakja üreges csonka gömb. A kérdéses test anyaga homogén, izotrop, lineárisan rugalmas. A csavarási feladat megoldásához a Michell elméletet használjuk fel, mely változó körkeresztmetszetű tengelyek csavarására lett kidolgozva. Analitikus megoldást mutatunk be a nyírófeszültségek és elmozdulások meghatározására. A felírt módszer illusztrálására egy numerikus példát is bemutatunk. A példa eredményei felhasználhatóak, mint benchmark megoldás más numerikus módszerekből, például végeselem módszerből nyert megoldások pontosságának elemzésére.

• An Analytical Solution for Static Problems of Cantilever Curved Beams with Variable Cross Sections

  226-233

  Ecsedi István

  Lengyel Ákos

  Baksa Attila

  Gönczi Dávid

  Megtekintések száma:

  145

  This paper gives an analytical method to obtain the deformation of a cantilever curved beam. The curved beam considered has circular centre line and the thickness of the cross section in radial direction depends on the circumferential coordinate. The kinematics of the Euler-Bernoulli beam model is used to formulate of governing equations. The curved homogeneous and isotropic elastic beam is fixed at the one of the end cross section and on the other end cross section is subjected to concentrated forces and a couple. A numerical example illustrates the applications of the derived formulae.

• An Analytical Solution for the Two-Layered Composite Beam-Column with Interlayer Slip and Constant Axial Load

  14-31

  Ecsedi István

  Baksa Attila

  Lengyel Ákos József

  Gönczi Dávid

  Megtekintések száma:

  90

  The authors present an analytical solution for the two-layered composite beams with imperfect shear connections. The considered beam is simply supported at both ends. The beam is subjected to transverse and axial loads. The kinematic assumptions of the Euler-Bernoulli beam theory are used. The connection of the beam components is perfect in normal direction, but the axial displacement field may have jump. The shear axial force derived from the imperfect connection is proportional to the relative slip occurring between the layers. The determination of the analytical solution is based on the Fourier method. Two examples illustrate the application of the presented analytical method.

• Thermoelastic Problems of Multilayered Spherical Pressure Vessels Subjected to Axisymmetric Loading

  106-115

  Gönczi Dávid

  Megtekintések száma:

  134

  This paper deals with the linear thermoelastic analysis of functionally graded multilayered spherical bodies subjected to constant mechanical and thermal loading. The temperature field is arbitrary function of the radial coordinate, the material properties and the radial body force vary according to power law functions along the radius of the sphere. An analytical method is presented to calculate the displacements and stresses within the multilayered spherical body. The method is expanded to tackle the problem of spherical bodies made from radially graded materials with temperature dependent material properties. The results are compared to finite element simulations and other methods.