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Local dynamic buckling of C-shape profile subjected to bending

Urbaniak M., Kubiak T.

Mechanics and Mechanical Engineering

2011

Vol. 15, nr 2

133-148

This paper deals with local dynamic buckling of thin-walled girder segments (short beam-columns) subjected to bending. Various shapes of pulse loading (triangle, trapezoid and rectangle) with a duration corresponding to the fundamental period of vibration were taken into account. Assumed boundary conditions correspond to a simple support, this agrees with conditions that exist in the place of the diaphragm in a long spar. The problem was solved by finite element method. In order to determine the critical load pulse amplitudes Volmir, Budiansky-Hutchinson, Ari-Gur and Simonetta criteria were employed.

Dynamic stability of an axially moving sandwich composite web

Marynowski K., Kołakowski Z.

Mechanics and Mechanical Engineering

2004

Vol. 7, nr 1

53-67

Dynamic stability of an axially moving corrugated board web has been investigated. The board web is modeled as an thin-walled composite plate structure. Mathematical model of the moving web system has been derived using the classical laminated panel theory. In the solution of the problem the Koiter's asymptotic expansion and the numerical transition matrix method have been employed: The results of numerical investigations show the solutions to the linearized problem. The effects of the transport velocity and axial load of the web on its dynamic stability are presented.

Buckling and initial post-buckling behaviour of thin-walled elliptic shells under bending

Królak M., Kołakowski Z.

Mechanics and Mechanical Engineering

2004

Vol. 7, nr 1

97-105

The problem of the buckling and the initial post-buckling equilibrium paths of thin-walled cylindrical and elliptic shells subjected to bending has been carried out. Shell elements can be made of multi-layer orthotropic materials. The problem has been solved within the first order approximation of Koiter's asymptotic- theory, using the transition matrix method.