Torthaí cuardaigh - W. Gutkowski

The displacement equation (3.6) is given for a regular three-dimensional bar system known under the name of unitstrut system. The problem is given a uniform treatment by means of the difference calculus, the segmental character of the system being preserved throughout the entire argument. In conclus...

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This paper contains the equations for the determination of the forces, displacements and stability conditions for a shell with a regular net of bars. In particular, the stability of a quadratic shell subjected successively to axial compression and torsion is considered. From these considerations it...

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The object of the present considerations is a regular bar system shown by Fig. 1. In order to avoid two rough simplifications the difference calculus is used throughout the paper. The resolving functions are given for the most frequent case of square shell. From these functions it follows that the...

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An exact determination of the limiting load capacity of plates having in plane composite shapes, and in particular of plates with discontinuous boundary conditions and perforated plates involves great difficulties. However, it is relatively easy to determine the lower estimate of limiting load capac...

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The paper deals with an effective adaptive method for 2D shape optimization of linear elastic structures. The design objective is to find the shape of the kinematically unconstrained boundary assuring minimum volume of the structural material with constraints imposed on equivalent stresses. The geo...

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A simple and effective method of stress-controlled shape optimization of 2D linear elastic structures is presented. The main elements of the method are: adaptive FE grids fitting well to the structure shape at each iteration step of the proposed simple optimization algorithm and the concept of stres...

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