These detailed characteristics require precise mechanical testing to ensure that the welding process is correct and that the mechanical properties of the joint are adequate. The test machine (materials testing equipment) that can apply dynamic loads (fatigue studies) and / or static (to control the load angle error) are used to check the mechanical performance of the welds. TESTS flexi N Such testing involves carrying out a bending test at four points, applying cyclic loading to verify the performance of the weld in regard to fatigue. The charge will be applied sinusoidal, which will go from the maximum load value up to 90% of that value. This tension is repeated for five million cycles or until the solder fails. If failure occurs, the part must be marked and the series belonging to the discarded.
Ca LOAD TEST CLICK This is the most essential tests. It is playing a regular load of constant amplitude, for three million cycles in a position and at an angle to simulate the actual stress exerted by a train of wheels on the railway line. The magnitude of the load and actuator position (angle of load application) is determined from the value of vertical dynamic stiffness of the plate bearing the railway line. Elements adapted tests on materials used are of polymer, for the following reasons: – Insulation: essential to ensure that interference will not occur. – Comfort: It has a high absorption / damping qualities.
Therefore, it is essential to confirm the validity of the benefits of these materials when subjected to high voltages. TESTS ON RIGID ELEMENTS normal load for this test are 25 and 95 kN, and applied for one minute. – Tensile strength: Looking for the residual deformation of the coil. A load of 20 kN is applied to the sheath steadily. Subsequently, the load increases to a maximum of 1.1 kN per mm coil inserted. This load is maintained for two minutes before the release of 20kN load up again. Once you spend a minute with this last load, the deformation is measured. The value of this residual deformation should be less than 0.35 mm – Value of the ultimate tensile strength: The average value must be greater than 1.65 kN / mm coil inserted. First aplica1, 1 kN per mm coil inserted. If you break the pod, it records the value 1.1. If there is breakage of the load is increased until failure or up to 2 mm kN. FATIGUE TESTING UNDER LOAD LATERL A device is used to simulate the load side of the railway. This lateral load of the compression type for the part in question. The test conditions are the real operating conditions.