PSI- Issue 9

I. Shardakov et al. / Procedia Structural Integrity 9 (2018) 207–214 Author name / Structural Integrity Procedia 00 (2018) 000–000

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Fig. 1. The diagram of the flange connection (dimensions are in millimeters).

E1, E2 – location of sensors for measuring deformation in a horizontal direction, EF – location of sensor for measuring deformation along the beam axis. The system for measuring deformation parameters consisted of three displacement sensors and three deformation ones. Fig. 2 shows the arrangement of the displacement sensors. Relative to the independent reference base the vertical displacements of the horizontal beams in the vicinity of the places of application of forces from the hydraulic jacks, as well as the vertical movement of the lower end of the vertical column, were measured. Such a scheme for measuring vertical displacements made it possible to control the symmetry of the deformation relative to the vertical column, and also to determine the value of the vertical displacement of the column only due to the entire set of the deformation processes in the flange connection. The positions of sensors E1, E2 on the vertical column and EF on the horizontal beam are determined from the results of mathematical modeling of the quasistatic deformation process in the framework of the elasto-plastic deformation. The E1, E2 sensors are designed to record the dominant strain values along the horizontal axis on the shelf of the vertical column. The EF sensor is fixed on the upper shelf of the horizontal beam at a distance of 33 cm from the flange. Such a position of this sensor ensures absence of plastic deformations and allows one to control the effort from the jacks.

Fig. 2. The structural diagram of the test stand with a sample: 1 – power frame; 2 – support for the jacks; 3 – vertical column of the flange connection; 4 – horizontal beam of the flange connection; 5 – hydraulic jack