PSI - Issue 68

Lucie Malíková et al. / Procedia Structural Integrity 68 (2025) 225–230 L. Malíková et al. / Structural Integrity Procedia 00 (2025) 000–000

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Table 1. Dimensions of the anchor/concrete specimen, see Fig. 1 for more details about the geometry. Parameter Value Unit R 1 15.0 mm R 2 22.5 mm R 3 450.0 mm R C 1, 2, 3 and 4 mm L air 25.0 mm L em 50.0 mm L tot 390.0 mm t 5.0, 7. 5, 10.0, 12.5, 15.0 mm

ANSYS computational software was utilized for finite element (FE) simulations. Higher order 2D, 8-node or 6 node elements PLANE183 with quadratic displacement behaviour were used for modelling the geometry of the anchor/concrete specimen described above. Their properties are suitable for creating irregular FE meshes. Axial symmetry conditions were defined within the numerical analysis (the symmetry axis can be seen on the left in Fig. 1. An example of the finite element mesh for a selected configuration is plotted in Fig. 2, where also the displacement of the anchor’s upper surface can be seen. This vertical displacement of 0.05 mm simulated the tensile loading of the anchor/concrete specimen.

Fig. 2. An example of the finite element mesh with applied boundary conditions.

Young’s modulus and Poisson’s ratio were considered 23.5 GPa and 0.2 for the concrete substrate and 210 GPa and 0.3 for the steel anchor, respectively. Both material models were set as linear elastic. Five various geometrical configurations were modelled for various thicknesses of the anchor’s basement and for each of them, tangential stress distribution was investigated at selected radial distances 1, 2, 3 and 4 mm around the anchor’s corner, see Fig. 1a) and 1b) for more details about the geometry and orientation of the polar coordinate system used for this analysis. The choice of the tangential stress is based on both the idea of the maximum tangential stress criterion, see Erdogan and Sih (1963), and on previous authors’ collective research, see Malíková et al. (2024) or Malíková and Miarka (2025). The obtained dependences are presented and discussed in the following section.