The test machines (materials testing equipment) that can be applied loads dynamic (fatigue studies) and / or static loads (to control the angle load Error) are used to check the mechanical performance of the welds. TRIALS of bending this test type implies the execution of a bending test on four points, applying cyclic load to verify the performance of welding in what refers to fatigue. Charge applies of sinusoidal shape, which will run from the value of maximum load up to 90% of that value. This tension will be repeated during five million cycles or until the weld fails. If the fault occurs, the workpiece must be marked and the series to which it belongs discarded. CYCLIC load tests this is the most essential of the tests carried out. It’s playing a regular load of constant amplitude, by three million cycles, in a position and at an angle that simulates the actual tension acting as a train of wheels on the rail line.
The magnitude of the load and the position of the actuator (angle of the load application) shall be determined from the value of vertical dynamic rigidity of the plate indicating the railway line. TEST conducted on elements ADAPTABLE Los materials used are polymer, for the following reasons:-insulation: essential to guarantee that interference will not occur. -Comfort: Has a high-level absorption / damping qualities. Therefore, it is essential to confirm the validity of the benefits of these materials when they are subjected to high voltages. ITEMS rigid the normal charge for this test about trials are 25 and 95 kN, and apply for a minute. -Tensile strength: looking for residual deformation of the coil. A load of 20 kN is applied to the sheath in a consistent manner. Subsequently, the load increases up to a maximum of 1.1 kN per mm of coil inserted.
This load is kept for 2 minutes before the release of the load of up to 20kN again. Once you pass a minute with this last load, the deformation is measured. The value of this residual deformation must be less to 0.35 mm – value of the break by pulling: the average value must be greater than 1.65 kN per mm of coil inserted. The first is aplica1, 1 kN per mm of coil inserted. If the sheath is broken, register the value 1.1. If there is breakage of load is increased until the break or 2 mm kN. TRIAL of fatigue under load side a device is used to simulate the load side of the railway. This lateral load is the type of compression for the part in question. The test conditions are the real operating conditions.