High frequency tension compression fatigue test of gray cast iron

Plg-100 high-frequency fatigue testing machine is used for high-frequency tension compression fatigue test of gray cast iron. The number of cycles is set as 10000000, and whether the sample is broken is taken as the standard to check whether the sample is qualified or not. The loading frequency of high-frequency fatigue test is 130hz-140hz, which can be calculated by taking 135hz. It takes only 20 hours for one sample to complete 10000000 cycles, It can greatly improve the test efficiency.

The test material of high frequency tension compression fatigue test of gray cast iron is low alloy HT250, the stress ratio r = – 1, and the loading force waveform is sine wave. A total of 16 samples were tested in high frequency tension compression fatigue test.

Load all samples successively until the sample completes the cycle or fracture, and record the test data.

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