Wyniki 1-1 spośród 1 dla zapytania: authorDesc:"Henryk Achtelik"

Research of maximum stresses zones in circular perforated plates made of S235JR steel loaded with concentrated force DOI:10.15199/28.2019.2.4

  1. INTRODUCTION Present engineering constructions are characterized by a decrease in terms of the safety factor, that is why calculations of strength, stiffness and stability of thin-walled construction elements are becoming some of the important aspects in all branches of technology, especially such as chemical engineering. There are many applications of perforated plates, e.g. in pressure vessels, chemical equipment (heat exchanger tube screens) [1÷3], oil refineries, aircraft and spacecraft parts, aircraft, robots, transport containers, box conveyors or as elements of loose material screens, which can be subjected to a load that varies over time. This type of girders (perforated plates) can also act as mounting boards in which holes are made for various operational reasons [4]. In practical problems of design, it is often necessary to determine stresses and deflections in such plates, which are loaded with static forces acting perpendicular to their surface. Due to the wide application of perforated elements in many branches of industry, it is advisable to undertake studies involving the analysis of the state of stress such elements subjected to a normal load. Knowledge of the state of stress will offer optimal design; and thus, safe operation of devices in which these types of components are used has been made more feasible [5÷7]. In the literature many attempts were made to analyse stress concentration, deflections, strains, stress concentration factor and stress intensity factor in perforated plates weakened because of openings comprised in them. The analytical method [8÷10], the experimental method [11÷14] and the numerical method [15÷21] were used to evaluate the parameters of perforated plates. During the analysis of perforated plates, various design parameters were varied, which have a significant impact on the nature of the correct operation of these plates, i.e.: type of material (isotropic, orthotropic, composite [...]

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