PSI - Issue 66

Lucie Malíková et al. / Procedia Structural Integrity 66 (2024) 142–147 Author name / Structural Integrity Procedia 00 (2025) 000–000

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3. Results of FE simulations and discussion As it is mentioned in the previous section, the tangential stress was analysed at selected radial distances from the anchor’s corner, as it is marked in Fig. 1. The idea comes from the well-known fracture criterion of maximum tangential stress (MTS) that assumes crack propagation in the direction of the maximum tangential stress, see Erdogan and Sih (1963) for more details. Although there is no crack, in the model of the steel anchor embedded in the concrete substrate, the anchor’s corner acts also as a stress concentrator. It was also shown in Malíková et al. (2024), that tangential stress distribution can help to explain the results of experimentally observed concrete cone failures. Meaning of the  angle, where the maximum values were searched can be seen in Fig. 1 and various kinds of results can be seen in Figs. 3 to 5. Fig. 3 shows how the maximum value of the tangential stress varies with the increasing radial distance considering various depths of the anchor’s embedment. It can be seen that the values only slightly dependent on the distance from the anchor’s corner and increase with the smaller anchor’s embedment depth.

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Lem = 50 mm Lem = 100 mm Lem = 150 mm Lem = 200 mm Lem = 300 mm Lem = 500 mm

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Fig. 3. Dependence of the maximum value of the tangential stress on the radial distance R C for various depths of the anchor’s embedment.

Fig. 4 represents dependences of the angle where the tangential stress reaches its maximum (  max ) on the radial distance R C . Results for only selected anchor’s embedment depths are introduced. It can be concluded that higher values of the critical distance provide better information about the changes of the  max values for various anchor’s embedment depths. Thus, the dependence of  max values on the anchor’s embedment depth obtained at the radial distance of 5 mm from the anchor’s corner is presented in Fig. 5.