Investigation and design for TMF test method of elastic sheet

Targeting the requirements of thermal mechanical fatigue (TMF) test for elastic sheet, the method of loading pressure and thermal loads was put forward using mechanical design technology, mechanical and electrical technology, cooling technology and data acquisition technology, a parallel test control system of two parallel loads, five test pieces was set up, and a thermal mechanical low cycle fatigue exerciser for elastic sheet was designed. Test results showed that, the system can simulate both the pressure load and thermal load of the elastic sheet in the service environment. The thermal mechanical low cycle fatigue test of elastic sheet was carried out by this test system, and the failure modes of elastic sheet in service state were found. The test system had good repeatability, high loading frequency and loading accuracy. The maximum relative error of pressure load was 2.4%, and the absolute error was less than 0.5N. The maximum relative error of temperature load was 3.55%, and the maximum absolute error was 3.89℃.