The Fatigue Test of Rail Clip
- Place the test strip onto the measuring platform and utilize a dial gauge to measure the relative elevation of the front end of the strip's middle section. The reading accuracy should be 0.01mm, denoted as Ho.
- Assemble the bullet bar according to standard procedures, ensuring that a portion of the bullet bar is embedded within the hard metal embedded block in an arc configuration.
- Initiate the fatigue testing procedure by bringing the loading head of the fatigue testing machine into contact with the standard loading beam. The loading head should continue to move downward relative to the loading device's substrate until the displacement reaches the specified design and assembly displacement (denoted as d) of the spring bar.
- After achieving displacement as per step 3, continue applying dynamic displacement within the range of +0.50 to 0.90 mm. This entails maintaining a displacement of the buckle end of the spring bar at d+0.5d_o.9 during the fatigue testing process.
- Perform loading cycles totaling 5 * 10 ^ 6.
