Issue 51

M. M. Konieczny et alii, Frattura ed Integrità Strutturale, 51 (2020) 164-173; DOI: 10.3221/IGF-ESIS.51.13 164 Finite Element Analysis (FEA) and experimental stress analysis in circular perforated plates loaded with concentrated force Mateusz Marcin Konieczny, Henryk Achtelik, Grzegorz Gasiak University of Technology in Opole, Poland mateuszmarcinkonieczny@wp.pl, h.achtelik@po.edu.pl , g.gasiak@po.edu.pl A BSTRACT . The paper presents an analysis of an isotropic circular axisymmetric perforated plate loaded with concentrated force P i applied in the geometric center of the plate using finite element software ANSYS. The test plate with diameter D = 300 mm has holes arranged at ten different radial spacings. The plate has holes with diameter d 1 = 3.5 mm on the first inner circle, and holes on the tenth outside circle have a diameter d 10 = 20.5 mm. The plate of the above geometry was free supported and loaded with different values of concentrated force. By means of numerical calculations using the finite element method, the coordinates of equivalent (von Mises) stress concentration zones in the perforated plate were determined. These zones were located on the plate bridges between perforation holes. The most hazardous place in the analysed perforated plate is associated with the outer circle, Z10, with the hole radius d 1 = 3.5 mm at the circle radius R 1 = 22.5 mm, where the highest stress concentration occurs. In this zone, the equivalent (von Mises) stress is σ red max = 416.90 MPa (point with the coordinates x, y, z [mm], i.e. P 10 [-69.9; 72.5; 0.0]). The results of numerical calculations were verified with experimental results. The differences between the results of numerical calculations of the state of stress and those obtained experimentally did not exceed 31%. K EYWORDS . Circular perforated plate; Concentrated force; Equivalent (von Mises) stress; Numerical calculations; Experimental research Citation: Konieczny, M. M., Achtelik, H., Gasiak, G., Finite Element Analysis (FEA) and experimental stress analysis in circular perforated plates loaded with concentrated force, Frattura ed Integrità Strutturale, 51 (2020) 164-173. Received: 06.10.2019 Accepted: 12.11.2019 Published: 01.01.2020 Copyright: ©2020 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. I NTRODUCTION n engineering practice, a plate construction element is often used in which a series of holes are drilled to form a dense, regular mesh. Currently, there are many applications of perforated plates, e.g. in a pressure vessel, chemical apparatus (heat exchanger tube walls) [1-4], oil refineries [5], air units, e.g. construction elements of aircraft and spacecraft, robots, transport containers, box conveyor or as elements of loose material screens, which can be subjected to a load that varies over time [6-9]. This type of girders (perforated plates) can also act as mounting boards in which holes are made for various operational reasons [10-12]. Literature studies show that there are many publications undertaking an analysis of perforated plates. In general, scientists use several methods to analyze the state of stress, strains and deflection in perforated panels. Such methods are divided into three groups: analytical [13], experimental [14, 15] and numerical [16-19]. Analytical methods are generally used to analyze I